1. Anxiety Disorders Clinic, Clarke Institute of Psychiatry, Department of Psychiatry, University of Toronto, Toronto, Ontario.
2. Anxiety Disorders Clinic, Clarke Institute of Psychiatry, Department of Psychology, York University, Toronto, Ontario.
3. Department of Psychiatry, Toronto General Hospital, Anxiety Disorders Clinic, Clarke Institute of Psychiatry, Toronto, Ontario.
4. Anxiety Disorders Clinic, Clarke Institute of Psychiatry, Toronto, Ontario.