1. New York State Psychiatric Institute, Department of Psychiatry, Vagelos College of Physicians and Surgeons, Columbia University, New York
2. Center for Health Services Research on Pharmacotherapy, Chronic Disease Management, and Outcomes, Institute for Health, Health Care Policy and Aging Research, Rutgers University, The State University of New Jersey, New Brunswick, New Jersey
3. Now withDivision of Epidemiology, Services, and Prevention Research, National Institute on Drug Abuse, Bethesda, Maryland