Area of research
Epidemiology · Pharmacology
Research interest
Research interests include Substance Abuse Treatment and Outcomes, Cannabis and Cannabinoid Research, Prenatal Substance Exposure Effects, and Child and Adolescent Psychosocial and Emotional Development.
The impact of schizophrenia genetic load and heavy cannabis use on the risk of psychotic disorder in the EU-GEI case-control and UK Biobank studies
Multivariate genome-wide association meta-analysis of over 1 million subjects identifies loci underlying multiple substance use disorders
Cannabis use in Adolescence and Risk of Psychosis: Are there Factors that Moderate this Relationship? A Systematic Review and Meta-Analysis
Developing a real-world evidence base for prescribed cannabis in the United Kingdom: preliminary findings from Project Twenty21
The Relationship Between Childhood Physical and Sexual Abuse and Adolescent Cannabis Use: A Systematic Review
The continuity of effect of schizophrenia polygenic risk score and patterns of cannabis use on transdiagnostic symptom dimensions at first-episode psychosis: findings from the EU-GEI study
Changes in delta‐9‐tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta‐analysis
Assessing the public health impacts of legalizing recreational cannabis use: the US experience
Daily use of high-potency cannabis is associated with more positive symptoms in first-episode psychosis patients: the EU-GEI case–control study
The Effects of Cannabis Use on the Development of Adolescents and Young Adults
Global systematic review and ecological analysis of HIV in people who inject drugs: National population sizes and factors associated with HIV prevalence
The contribution of cannabis use to variation in the incidence of psychotic disorder across Europe (EU-GEI): a multicentre case-control study
Public health implications of legalising the production and sale of cannabis for medicinal and recreational use
Mobile telephone‐delivered contingency management interventions promoting behaviour change in individuals with substance use disorders: a meta‐analysis
Characterising heterogeneity in the use of different cannabis products: latent class analysis with 55 000 people who use cannabis and associations with severity of cannabis dependence
A Global Meta-analysis of the Prevalence of HIV, Hepatitis C Virus, and Hepatitis B Virus Among People Who Inject Drugs—Do Gender-Based Differences Vary by Country-Level Indicators?
Associations between national development indicators and the age profile of people who inject drugs: results from a global systematic review and meta-analysis
Premorbid Adjustment and IQ in Patients With First-Episode Psychosis: A Multisite Case-Control Study of Their Relationship With Cannabis Use
Transancestral GWAS of alcohol dependence reveals common genetic underpinnings with psychiatric disorders
Global, regional, and country‐level estimates of hepatitis C infection among people who have recently injected drugs
Increasing potency and price of cannabis in Europe, 2006–16
Changes in cannabis potency and first-time admissions to drug treatment: a 16-year study in the Netherlands
A new approach to formulating and appraising drug policy: A multi-criterion decision analysis applied to alcohol and cannabis regulation
Genetic Predisposition vs Individual-Specific Processes in the Association Between Psychotic-like Experiences and Cannabis Use
Denise Kandel's classic work on the gateway sequence of drug acquisition
Trans-ancestral GWAS of alcohol dependence reveals common genetic underpinnings with psychiatric disorders
Global prevalence of injecting drug use and sociodemographic characteristics and prevalence of HIV, HBV, and HCV in people who inject drugs: a multistage systematic review
Global, regional, and country-level coverage of interventions to prevent and manage HIV and hepatitis C among people who inject drugs: a systematic review
Polysubstance use and misuse or abuse of prescription opioid analgesics: a multi-level analysis of international data
Major depressive disorder, suicidal thoughts and behaviours, and cannabis involvement in discordant twins: a retrospective cohort study