1 Department of Psychiatry, Faculty of Medicine, University of British Columbia, Vancouver, BC V6T 1Z3, Canada. Electronic address: m.krausz@mac.com.
2 Department of Psychiatry, Faculty of Medicine, University of British Columbia, Vancouver, BC V6T 1Z3, Canada; Center for Addictive Disorders, University Psychiatric Clinics Basel, University of Basel, Basel, Switzerland.
3 Department of Psychiatry, Faculty of Medicine, University of British Columbia, Vancouver, BC V6T 1Z3, Canada.