1. From the Health Services Research and Development Center of Excellence, Ann Arbor Veterans Affairs Medical Center, and the Department of Internal Medicine, University of Michigan — both in Ann Arbor (B.K.N., S.S.); the Orange Coast Women's Medical Group and the Department of Obstetrics and Gynecology, Saddleback Hospital, Laguna Hills, Calif. (M.S.); and the Gill Heart Institute and the Department of Internal Medicine, University of Kentucky School of Medicine, Lexington (D.M.).