1. Social and Epidemiological Research Department; Centre for Addiction and Mental Health; London Canada
2. Department of Psychology; Western University; London Canada
3. Dalla Lana School of Public Health; University of Toronto; Toronto Canada
4. National Drug Research Institute; Curtin University; Perth Australia
5. College of Social Work; The Ohio State University; Columbus USA
6. Pacific Institute for Research and Evaluation; Calverton USA
7. School of Psychology; Deakin University; Geelong; Australia
8. Department of Epidemiology; Western University; London Canada