1. From the Cardiovascular Health Research Center (J.V.P., W.S.H.), Sanford Research/USD and Sanford School of Medicine, Sioux Falls, SD; Emory University School of Medicine (S.G.), Atlanta, Ga; and Medicine and Epidemiology and Biostatistics (B.E.C., M.A.W.), University of California, San Francisco, and Section of General Internal Medicine, VA Medical Center, San Francisco, Calif.