1. Department of General Internal Medicine University of Pittsburgh Pittsburgh Pennsylvania USA
2. Department of Psychiatry, College of Medicine University of Arizona Tucson Arizona USA
3. Department of Psychiatry Washington University School of Medicine in St. Louis St. Louis Missouri USA
4. Department of Psychiatry and Biobehavioral Sciences University of California Los Angeles California USA
5. Centre for Addiction and Mental Health, Department of Psychiatry, Temerty Faculty of Medicine University of Toronto Toronto Canada
6. School of Medicine University of Pittsburgh Pittsburgh Pennsylvania USA
7. Department of Psychiatry Columbia University College of Physicians and Surgeons and the New York State Psychiatric Institute New York New York USA