Leo R. Zacharski is with Research Service, Veterans Affairs Hospital, White River Junction, VT, and the Department of Medicine, Geisel School of Medicine, Dartmouth College, Hanover, NH. At the time of the study, Ralph G. DePalma was with Veterans Affairs, Sierra Nevada Health Care Network, University of Nevada School of Medicine, Reno, and the VA Central Office, Uniformed University of the Health Sciences, Bethesda, MD. Galina Shamayeva and Bruce K. Chow are with the Veteran Affairs Cooperative Studies...