1. Department of Psychiatry, University of Montreal, Montréal, Québec
2. Department of Psychiatry, McGill University, Montréal, Québec
3. Prevention and Early Intervention Program for the Psychoses, Douglas Mental Health University Institute, Montréal, Québec
4. Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia
5. Nova Scotia Early Psychosis Program, Halifax, Nova Scotia
6. Departments of Psychiatry and Epidemiology and Biostatistics, Western University, London, Ontario