International Journal of Drug Policy

Papers
(The TQCC of International Journal of Drug Policy is 9. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2022-01-01 to 2026-01-01.)
ArticleCitations
Publisher's Note248
Incarceration history, antiretroviral therapy, and stigma: A cross-sectional study of people with HIV who inject drugs in St. Petersburg, Russia167
Opioid prescribing restrictions and opioid use among the Louisiana Medicaid population94
Doing more with less: A proposal to advance cigarette packaging regulations in the United States82
A matter of craving–An archeology of relapse prevention in Swedish addiction treatment75
Editorial Board63
Editorial Board61
Editorial Board58
Bridging the gap: An environmental scan of post-overdose program features and evaluation measures57
Leveraging pooled medical examiner records to surveil complex and emerging patterns of polysubstance use in the United States54
Editorial Board54
Inconsistencies between national drug policy and professional beliefs about psychoactive drugs among psychiatrists in the United States53
Older age at smoking initiation predicts successful cessation in adults who smoke: A prospective study51
International property rights for Cannabis landraces and terroir products. The case of Moroccan Cannabis and hashish48
A comprehensive analysis of jurisdiction-specific laws related to scheduling or required prescription drug monitoring of gabapentin in the United States, 2016–202448
Co-designing the INHSU Prisons Hepatitis C Advocacy Toolkit using the Advocacy Strategy Framework48
Increased solitary drug use during COVID-19: An unintended consequence of social distancing47
Social-spatial network structures among young urban and suburban persons who inject drugs in a large metropolitan area47
Medication for opioid use disorder treatment continuity post-release from jail: A qualitative study with community-based treatment providers46
Identifying barriers and enablers to opt-out hepatitis C virus screening in provincial prisons in Quebec, Canada: A multilevel, multi-theory informed qualitative study with correctional and healthcare45
Impact of the COVID-19 pandemic on the provision of take-home doses of opioid agonist therapy in Ontario, Canada: A population-based time-series analysis45
Ecological dimensions of cannabis regulation in the Rif, Morocco44
Editorial Board44
The introduction of fentanyl on the US–Mexico border: An ethnographic account triangulated with drug checking data from Tijuana43
The social-structural contexts of cannabis consumption and harm reduction among young Nigerian women42
Diversion of medications to treat opioid use disorder: Qualitative findings from formerly incarcerated adults in Massachusetts41
Quasi-experimental study on the impact of local smoke-free policies on smoking among Indonesian adults: Evidence from repeated national health surveys40
‘Choice’ of social media platform or encrypted messaging app to buy and sell illegal drugs39
A content analysis of cannabis edibles package marketing in the United States39
The effectiveness of the communities that HEAL intervention on reducing non-fatal opioid overdoses: A prespecified secondary analysis of a waitlist cluster control randomized controlled trial38
Opioid agonist therapy engagement and crystal methamphetamine use: The impact of unregulated opioid use in Vancouver, Canada38
Higher methadone dose at time of release from prison predicts linkage to maintenance treatment for people with HIV and opioid use disorder transitioning to the community in Malaysia38
Trends in the use of cannabis products in Canada and the USA, 2018 – 2020: Findings from the International Cannabis Policy Study38
Updates on syringe coverage and service uptake among needle and syringe programs in the United States, 2019–202037
Likelihood of using a harm reduction vending machine among rural people who inject drugs in Appalachian Kentucky36
‘Pretty in Pink’ and ‘Girl Power’: An analysis of the targeting and representation of women in alcohol brand marketing on Facebook and Instagram35
Putting tendencies and trajectories to work: useful tools for engaging with accounts of change and recovery?35
Cannabis reduction among adolescents as spillover from successful tobacco control35
Buprenorphine dispensing before and after the April 2021 X-Waiver exemptions: An interrupted time series analysis35
Associations of hepatitis C virus (HCV) antibody positivity with opioid, stimulant, and polysubstance injection among people who inject drugs (PWID) in rural U.S. communities34
Speed and smoking kill: A time-varying survival analysis linking methamphetamine use, cigarette smoking, and mortality in sexual minority men34
Cannabis industry lobbying in the Colorado state legislature in fiscal years 2010–202134
Does cannabis testing in the military drive synthetic cannabinoid use? Self-reported use motivations among justice-involved veterans34
Transnational alcohol corporations in Nigeria as commercial determinants of health: Implications for policy34
Societal costs of illegal drug use in Sweden33
Strategies for addressing needle debris: A scoping review of needle debris and discarded drug paraphernalia associated with substance use32
The hammer and the nail: The triple lock of methods, realities and institutional contexts in Australian research on nightlife violence32
The impact of an easy access drug supply management policy law on the consumption and abuse of opioids in Catalonia: A population-based study32
How do patient, pharmacist and medication characteristics and prescription drug monitoring program alerts influence pharmacists' decisions to dispense opioids? A randomised controlled factorial experi32
‘As for dignity and respect…. me bollix’: A human rights-based exploration of service user narratives in Irish methadone maintenance treatment31
Applying a mutual capacity building model to inform peer provider programs in South Africa and the United States: A combined qualitative analysis31
A readiness assessment for the prevention of alcohol-related harm in West Africa: A new methodological approach to inform practice and policy30
A stakeholder-driven framework for measuring potential change in the health risks of people who inject drugs (PWID) during the COVID-19 pandemic30
Psychosocial stress and methamphetamine use: A mixed-methods study of intersectional stigma and Aboriginal and Torres Strait Islander methamphetamine use30
Stronger isn’t always better: Nalmefene in community overdose response and the false promise of quick-fix public health solutions30
Ethical justifications for safe supply interventions30
Playing at the edges, navigating sexual boundaries, and narrating sexual distress; Practices and perspectives of sexuality and gender diverse people who use GHB29
Does diverting minor drug offenders reduce recidivism? Cannabis cautioning in Australia29
Parenting and heavy substance use: From neutralization theory to actor-network theory to avoid stigmatizing participants29
Quantitative controls on the number and/or location of alcohol retail outlets: an overview of approaches in the USA and Canada28
Declining prevalence of current HCV infection and increased treatment uptake among people who inject drugs: The ETHOS Engage study28
Big business: The private sector market for image and performance enhancing drug harm reduction in the UK27
The practice and embodiment of “goofballs”: A qualitative study exploring the co-injection of methamphetamines and opioids27
Changes in arrests following decriminalization of low-level drug possession in Oregon and Washington27
Global cannabis cultivation as a gendered activity: Findings from the 2020 International Cannabis Cultivation Questionnaire27
Drug transactions and the dark web: Public perceptions of the locational setting of offenders and support for drug policy outcomes27
Trends in young people accessing English alcohol treatment services: 2014 to 202326
Measuring drug policy evolution: A cross-country analysis26
“What I should be doing is harm reduction, if I'm doing my job right”: Engagement with harm reduction principles among prosecutors enacting drug policy reform in the United States26
Comparing police use of drug detection dogs amongst injecting and non-injecting groups of people who regularly use drugs in Australia26
Reluctant risk-takers: how law enforcement practices at festivals can obstruct safer drug use26
An examination of the role of changes in country-level leisure time internet use and computer gaming on adolescent drinking in 33 European countries26
Growing pains: A study of administrative burden and regulatory compliance in German Cannabis Cultivation Associations under the Cannabis Act25
COVID-19 economic impact payments and opioid overdose deaths25
Heavy burden of non-fatal overdose among people who inject drugs in San Francisco, 202225
Do Australians use the prescription pathway when using nicotine vaping products to quit smoking?25
Low daily oral PrEP adherence and low validity of self-report in a randomized trial among PWID in Ukraine25
From environmental disasters to emerging drugs; a framework to understand, map and assess drug-related early warning systems25
High levels of all-cause mortality among people who inject drugs from 2018 to 202225
Spotting as a risk mitigation method: A qualitative study comparing organization-based and informal methods24
Vaccination coverage among people who inject drugs: A systematic review24
Becoming a nitrous oxide user on social media: Learning to maximise pleasures and minimise harms24
Has the treatment gap for opioid use disorder narrowed in the U.S.?: A yearly assessment from 2010 to 2019”24
Consent and violence amongst men in the context of sexualised drug use: A systematic scoping review24
Co-located Heroin Assisted Treatment within primary care: A preliminary analysis of the implications for healthcare access, cost, and treatment delivery in the UK24
Suboptimal uptake and placement of a mandatory alcohol pregnancy warning label in Australia24
Tackling the overdose crisis through unionization: A response to Rivera & Friedman (2024)23
Haven't I waited long enough? The role of wait times and subjective impairment in cannabis-related driving behavior23
Intersecting stigmas: How racial attitudes shape support for treatment and harm reduction for people who inject drugs23
2S/LGBTQ+ youth substance use and pathways to homelessness: A photovoice study23
Editorial Board23
Appearance of 2-MMC and 3-MMC on the illicit drug market in the Netherlands: A systematic narrative review of the prevalence and risks23
Editorial Board23
Slamsex as slow edgework: Sexualized drug use and harm reduction in post-AIDS Taiwan23
Scapegoated communities, shared struggles: A call for solidarity with people who use drugs and queer and trans people22
Municipal socioeconomic environment and recreational cannabis use in Mexico: Analysis of two nationally representative surveys22
Countering the institutionalization of harm reduction through critical pragmatism22
Exploring the need for overdose prevention centers in England: A qualitative community-based participatory study on the perspectives of people who use drugs in public and semi-public environments22
Access and care for people with opioid use disorder in U.S. skilled nursing facilities: A policy commentary22
The relationship between cryptomarket drug purchase, social networks and adverse drug events: A cross-sectional study22
Editorial Board21
Problematizing “patient stability” in opioid use disorder care: Flexible definitions, (in)flexible treatment21
“Harm per litre” as a concept and a measure in studying determinants of relations between alcohol consumption and harm21
Aging and street capital: Older men’s status and strategies in street culture21
Social and structural determinants of health associated with police violence victimization: A latent class analysis of female sex workers who use drugs in Kazakhstan21
Minimum legal age laws and perceived access to cigarettes, e-cigarettes, and other substances among youth in Canada, England, and the United States: 2017-202121
The benefits and challenges of virtual SMART recovery mutual-help groups: Participant and facilitator perspectives21
Self-reported and measured adherence to hepatitis C direct-acting antiviral therapy and sustained virologic response among people who inject drugs: The HERO study21
Public support for reinvesting resources from enforcing drug possession to health-promoting alternatives: A nationally representative poll of adults in the United States21
The impact of alcohol minimum unit pricing on people with experience of homelessness: Qualitative study20
Naloxone cascade of care among people who regularly inject drugs in Australia, 2020–202220
Interconnected influence: Unraveling purdue pharmaceutical's role in the global response to the opioid crisis20
Standard THC units: A tool to benchmark cannabis-related driving risks20
Community-level determinants of stakeholder perceptions of community stigma toward people with opioid use disorders, harm reduction services and treatment in the HEALing Communities Study19
Cannabis legalization and changes in cannabis and tobacco/nicotine use and co-use in a national cohort of U.S. adults during 2017–202119
The success rate of online illicit drug transactions during a global pandemic19
Drug use typology, demographic covariates, and associations with condomless anal sex: A latent class analysis among a U.S. national cohort of men who have sex with men19
Implementing a peer-supported, integrated strategy for substance use disorder care in an outpatient infectious disease clinic is associated with improved patient outcomes19
Pre-implementation findings on the barriers and potential solutions to initiate same-day antiretroviral therapy among people who inject drugs in Malaysia19
Psychedelic discourses: A qualitative study of discussions in a Danish online forum19
Recreational cannabis excise taxation in the USA: Constructing a comparable tax measure for empirical analysis19
Exploring trauma and wellbeing of people who use drugs after witnessing overdose: A qualitative study19
The details of decriminalization: Designing a non-criminal response to the possession of drugs for personal use19
Stronger, longer, better opioid antagonists? Nalmefene is NOT a naloxone replacement19
The intersection of substance use stigma and anti-Black racial stigma: A scoping review19
Prevalence of comorbid substance use disorders among people with opioid use disorder: A systematic review & meta-analysis19
Drugs, guns, and violent crime in California19
Characterizing changes in drug use behaviour following supply shortages of 5-MeO-DIPT, alkyl nitrites and new psychoactive substances among men living with HIV in Japan18
“It’s not just the hit itself”: the social practice of injecting drug use among gay and bisexual men in Australia18
Women's experiences in injectable opioid agonist treatment programs in Vancouver, Canada18
Risky alcohol use and violence against women: cause or consequence?18
Synergistic effects of exposure to multiple types of violence on non-fatal drug overdose among women who inject drugs in Indonesia18
Current regulations in context: Scraping Australia's online nitrous oxide market18
Editorial Board18
Post-retirement enlightenment syndrome: Worthy of investigation18
Transitions to legal cannabis markets: Legal market capture of cannabis expenditures in Canada following federal cannabis legalization18
Adoption of methadone take home policy by U.S. state opioid treatment authorities during COVID-1917
Beverage-specific consumption trends: A cross-country, cross-sectional comparison17
The impacts of COVID-19 on structural inequities faced by people living with HIV who inject drugs: A qualitative study in St. Petersburg, Russia17
The importance of PEOPLE who use drugs within drug policy reform debates: Findings from the UK Drug Policy Voices online survey17
‘Keeping a lid on it’: Exploring ‘problematisations’ of prescribed medication in prisons in the UK17
The association between social capital and drug overdose mortality in the United States17
The Baltic and Nordic responses to the first Taliban poppy ban: Implications for Europe & synthetic opioids today17
Beyond the smoke: Historical analysis of the revenue implications of state cigarette tax policies, 1989 to 201917
Decline in youth drinking in high-income settings: Implications for public health in low-income countries17
Editorial Board17
Barriers and advocacy needs for hepatitis C services in prisons: Informing the prisons hepatitis C advocacy toolkit17
Prevalence and engagement with healthcare services for hepatitis B infection among people in prison in Australia: the AusHep study17
Digital localisation in an illicit market space: interactional creation of a psychedelic assemblage in a darknet community of exchange16
System dynamics modeling to inform implementation of evidence-based prevention of opioid overdose and fatality: A state-level model from the New York HEALing Communities Study16
Editorial - Supporting the best quality science and the rights of people who use drugs regardless of global policy changes: Perspectives from the co-Editors in Chief of the International Journal of Dr16
Exploring how an e-cigarette intervention influenced tobacco smoking behaviour in people accessing homelessness services: Findings from the SCeTCH trial process evaluation16
Through the wine glass: How biographical midlife transitions and women's affective interpretations interact with alcohol consumption16
Corrigendum to “Sociological investigations of human enhancement drugs: The case of microdosing psychedelics” [International Journal of Drug Policy 95 (2021) 103099]16
Association between fatal opioid overdose and state medical cannabis laws in US national survey data, 2000-201116
Examining the association between trenbolone, psychological distress, and aggression among males who use anabolic-androgenic steroids16
A pilot implementation study to scale-up methadone in incarcerated persons with opioid use disorder and retain them on treatment after release in Moldova16
Corrigendum to ‘Substances from unregulated drug markets – A retrospective data analysis of customer-provided samples from a decade of drug checking service in Zurich (Switzerland)’ [Volume 114, April16
Neutral attitude toward the utilization of psychedelic therapy for depression in the United Kingdom population16
Patients prefer free drug disposal options delivered by pharmacists at the point of care: Results of a decision tree analysis of a national factorial vignette panel survey16
An on-site community-based model for hepatitis C screening, diagnosis, and treatment among people who inject drugs in Kerman, Iran: The Rostam study16
Trends in cannabis use among U.S. adults amid the COVID-19 pandemic15
Dublin’s supervised injecting facility: An assessment of its impact on discarded needles15
Monitoring for fentanyl within Australian supervised injecting facilities: Findings from feasibility testing of novel methods and collaborative workshops15
Radical hospitality: Innovative programming to build community and meet the needs of people who use drugs at a government-sanctioned overdose prevention site in San Francisco, California15
Facilitating access to direct-acting antivirals in a community-based point-of-diagnosis model for hepatitis C treatment: The role of the pharmacy team in the no one waits (NOW) study15
Anti-doping measures in gyms and fitness centres: A mapping of practices in the state parties of the council of Europe’s anti-doping convention15
Voices represented and voices silenced: Represented voices in the media coverage of the implementation of a supervised injecting facility15
Recovery as a minor practice15
Scoping review of the characteristics and implementation of routine outcome monitoring and feedback for adults and young people accessing alcohol and other drug use treatment15
Drug treatment and support service utilization amidst the COVID-19 pandemic among people who inject drugs in Baltimore, Maryland: An interrupted time-series analysis, 2015–202215
Availability and use of non-prescribed buprenorphine-naloxone in a Canadian setting, 2014–202015
Decrease in provider stigma is associated with improved quality health indicators among individuals receiving methadone in primary care centers in Ukraine15
96-week retention in treatment with extended-release subcutaneous buprenorphine depot injections among people with opioid dependence: Extended follow-up after a single-arm trial15
A call for compassionate opioid overdose response15
‘Red Flags’ and ‘Red Tape’: Telehealth and pharmacy-level barriers to buprenorphine in the United States14
Can alcohol policy prevent harms to women and children from men's alcohol consumption? An overview of existing literature and suggested ways forward14
Disentangling opioids-related overdose syndemics: a scoping review14
Association between U.S. state prenatal drug use laws and child welfare reporting in Alabama, Maryland and Utah14
“I've lost my children to vaping”: A frame analysis of the Australian media's construction of the “Youth vaping crisis”14
“It should be hard to be a drug abuser” An evaluation of the criminalization of drug use in Sweden14
‘Some days I am a lunatic that thinks I can moderate’: Amalgamating recovery and neo-liberal discourses within accounts of non-drinking among women active in the ‘positive sobriety’ community on Insta14
Changing Trends in Nonmedical Gabapentin Use Among a Cohort of Rural Appalachian People Who Use Drugs: A Longitudinal Study Over the Time Period of Scheduling Changes in Kentucky14
Unpacking the differing understandings of “alcohol industry” in public health research14
Volatile substances are an amorphous category, making it hard to build a comprehensive body of research14
Community-administered naloxone for overdose reversal: The role of sex worker-led programming and occupational violence in a community-based cohort (2018–2024)14
“There’s a lot of stereotypes going on”: A cross-national qualitative analysis of the place of gender in declining youth drinking14
‘I just drink to feel abnormal for some time’: Reconfiguring heavy drinking and intoxication as pleasurable14
Drug policy goals in a changing landscape: Perspectives of practitioners in Japan14
Impact of COVID-19 on the characteristics of opioid overdose deaths in Arkansas14
The economic factors that determine smoking abstinence: a survival and mediation analysis14
The effectiveness of smoking cessation interventions in rural and remote populations: Systematic review and meta-analyses14
Substances from unregulated drug markets – A retrospective data analysis of customer-provided samples from a decade of drug checking service in Zurich (Switzerland)14
Stimulant-involved overdose deaths: Constructing dynamic hypotheses13
From Anti-doping-I to Anti-doping-II: Toward a paradigm shift for doping prevention in sport13
Policy actor views on structural vulnerability in harm reduction and policymaking for illegal drugs: A qualitative study13
Connecting patients notified with hepatitis C to treatment (CONNECT Study): A randomized controlled trial of active case management by a health department to support primary care practitioners13
Addressing the complex substance use and mental health needs of people leaving prison: Insights from developing a national inventory of services in Canada13
Hepatitis C incidence among patients attending primary care health services that specialise in the care of people who inject drugs, Victoria, Australia, 2009 to 202013
Multilevel determinants of cannabis prices in legal markets: Evidence from products sold in nearly 4000 cannabis dispensaries in the United States13
Are dietary supplement users more likely to dope than non-users?: A systematic review and meta-analysis13
Defining a public health approach to substance use: Perspectives from professionals and practitioners across Canada13
The role of gifts in building influence with politicians: Thematic analysis of interviews with current and former parliamentarians13
Public calls for service to the police: Trends before and during drug possession decriminalization in Oregon13
Long-term patterns of treatment use for opioid use disorder (OUD): Findings from the 18-20-year Australian Treatment Outcome Study13
Editorial Board13
The Impact of Communicating the Benefits and Safety of Psilocybin on Policy Support: a Survey Based Experiment13
Psychomodulatory substances: New legislative framework for control of psychoactive substances in Czechia13
Alcohol policy changes during the first three-months of the COVID-19 pandemic: Development and application of a classification scheme13
Simulating the impact of Addiction Consult Services in the context of drug supply contamination, hospitalizations, and drug-related mortality13
Implementation of a multi-component alcohol policy in Ireland: A qualitative study exploring barriers and facilitators to implementation13
Not just fentanyl: Understanding the complexities of the unregulated opioid supply through results from a drug checking service in British Columbia, Canada13
Are recreational cannabis laws associated with declining medical cannabis program enrollment in the U.S.? An analysis of cardholder enrollment and demographic characteristics from 2013 to 202013
Factors associated with hepatitis C testing, treatment, and current hepatitis C infection among men and women who inject drugs: The ETHOS engage study13
Like birds of a feather? A multi-case study on the connections between cannabis, tobacco, alcohol and pharmaceutical companies in legalized cannabis markets13
Where to next? An exploration of ‘night-out’ location progression and propensity to experience violence in night -time entertainment precincts13
Multidimensional assessment of access to medications for opioid use disorder across urban and rural communities: A scoping review12
Using synthetic controls to estimate the population-level effects of Ontario's recently implemented overdose prevention sites and consumption and treatment services12
Policing and access to harm reduction services among young people who use drugs and young Indigenous people who use drugs before and after the pilot implementation of decriminalization of personal pos12
Using modelling and public health surveillance data to evidence progress towards the WHO incidence target for hepatitis C elimination in people who inject drugs - a review of complementary approaches 12
‘What makes up wine o'clock? Understanding social practices involved in alcohol use among women aged 40–65 years in Australia12
A concept mapping study of service user design of safer supply as an alternative to the illicit drug market12
Factors associated with attending “open bar” parties amongst early adolescents12
Sex-specific trends in patterns of tobacco and nicotine use among young people in Denmark from 2020 to 2023: A multigroup latent class analysis12
Understanding the longitudinal relationship between substance use and violent victimization among street-based women who exchange sex in Baltimore, Maryland12
Unlocking deflection: The role of supervisor support in police officer willingness to refer people who inject drugs to harm reduction services12
Safer supply programs: Discussions on medication diversion, sharing, and selling12
“Apparently, you can only be treated once”: A qualitative study exploring perceptions of hepatitis C and access to treatment among people who inject drugs visiting a needle and syringe program12
‘I just thought that was the best thing for me to do at this point’: Exploring patient experiences with depot buprenorphine and their motivations to discontinue12
Public transport access to drug treatment before and during COVID-19: Implications for the opioid epidemic12
Editorial Board11
Social forces shaping evidence production: A study of the swiss cannabis pilot trials11
The Züri Can study: Can regulated cannabis sales promote lower-risk cannabis use? Mini-review and study protocol11
Reduction in substance use stigma following a peer-recovery specialist behavioral activation intervention11
Effective package warning label systems for communicating relative risks of cigarettes, heated tobacco products, and e-cigarettes: An experimental study with Korean adults11
Trends and correlates of naloxone possession and use among people who inject drugs in Seattle, Washington11
“COVID just kind of opened a can of whoop-ass”: The rapid growth of safer supply prescribing during the pandemic documented through an environmental scan of addiction and harm reduction services in Ca11
Using drugs alone in single room occupancy housing: Understanding environmental drivers of overdose risk11
Reimbursing incarcerated individuals for participation in research: A scoping review11
Assessing options for cannabis law reform: A Multi-Criteria Decision Analysis (MCDA) with stakeholders in New Zealand11
The ‘knowing’ body in the becoming of buprenorphine depot treatment: A qualitative study11
“Another tool in the toolkit”—Perceptions, suggestions, and concerns of emergency service providers about the implementation of a supervised consumption site11
A scoping review of qualitative research on barriers and facilitators to the use of supervised consumption services11
Programmatic alcohol advertising, social media and public health: Algorithms, automated challenges to regulation, and the failure of public oversight11
What can we learn from low-THC cannabis growers in Europe? A comparative transnational study of small-scale cannabis growers from Italy and Switzerland11
Impacts of the COVID-19 pandemic on enrollment in medications for opioid use disorder (MOUD) in Vancouver, Canada: An interrupted time series analysis11
Barriers to calling emergency services amongst people who use substances in the event of overdose: A scoping review11
Factors associated with experiencing stigma, discrimination, and negative health care treatment among people who inject drugs11
“That was quick, simple, and easy”: Patient perceptions of acceptability of point-of-care hepatitis C RNA testing at a reception prison11
Consensus recommendations for opioid agonist treatment following the introduction of emergency clinical guidelines in Ireland during the COVID-19 pandemic: A national Delphi study11
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