1. Centre for Addiction and Mental Health, Toronto, Canada
2. Department of Psychiatry, University of Toronto, Toronto, Canada
3. Pakistan Institute of Living and Learning, Karachi, Pakistan
4. Division of Psychology and Mental Health, University of Manchester, Manchester, UK
5. Department of Psychiatry, Ziauddin Hospital, Karachi, Pakistan
6. Greater Manchester Mental Health NHS Foundation Trust, Manchester, UK
7. Statsconsultancy Ltd, Amersham, UK
8. School of Psychology, University of Birmingham, Birmingham, UK