1. Addiction and Mental Health Group (AIM), Department of Psychology; University of Bath; Bath UK
2. Nuffield Department of Primary Care Health Sciences; University of Oxford; Oxford UK
3. Public Health, Epidemiology and Biostatistics; University of Birmingham; Birmingham UK
4. Public Health Research Center; New York University Abu Dhabi; Abu Dhabi United Arab Emirates
5. Medical Sciences Division; University of Oxford; Oxford UK