1. Research Fellow in Addiction Psychiatry and Schizophrenia, Centre for Addiction and Mental Health, Department of Psychiatry, University of Toronto, Toronto, Ontario
2. Research Fellow, Positron Emission Tomography Centre, Centre for Addiction and Mental Health, Department of Psychiatry, University of Toronto, Toronto, Ontario
3. Associate Professor, Transdisciplinary Tobacco Use Research Center, Department of Psychiatry, University of Pennsylvania, Philadelphia, Pennsylvania
4. Professor and Chair in Addiction Psychiatry, Head, Division of Addiction Psychiatry, Department of Psychiatry, University of Toronto, Toronto, Ontario; Clinical Director, Schizophrenia Program, Centre for Addiction and Mental Health, Toronto, Ontario