VA Minneapolis Health Care System, Minneapolis, MN, USA. Electronic address: maurice.dysken@va.gov. Cooperative Studies Program Coordinating Center, VA Connecticut Healthcare System, West Haven, CT, USA. VA Cooperative Studies Program Clinical Research Pharmacy Coordinating Center, Albuquerque, NM, USA. William S. Middleton Memorial Veterans Hospital, Madison, WI, USA. Bronx Veterans Medical Research Center, New York, NY, USA. VAMC, Washington, DC, USA. Louis Stokes Cleveland VAMC, Cleveland, OH, USA. VA Minneapolis Health Care System, Minneapolis, MN, USA. University of Pennsylvania School of Medicine, Philadelphia, PA, USA. VA Miami Healthcare System, Miami, FL, USA. VA Maryland Healthcare System, University of Maryland Medical School, Department of Psychiatry, Baltimore, MD, USA. VA Maryland Healthcare System, Baltimore, MD, USA. VA North Texas Healthcare System, Dallas, TX, USA. Ralph H. Johnson VAMC, Medical University of South Carolina, Charleston, SC, USA. VA Ann Arbor Healthcare System, Ann Arbor, MI, USA. VA Caribbean Healthcare System, San Juan, PR. Bay Pines VA Healthcare System, Bay Pines, FL, USA. VA Boston Healthcare System, Boston, MA, USA. VA Puget Sound Healthcare System, Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA, USA. Iowa City VAMC, University of Iowa, Iowa City, IA, USA. W.G. (Bill) Hefner VAMC, Salisbury, NC, USA.