1. From the Division of General Internal Medicine (S.R.C., W.S.B.) and the Department of Epidemiology and Biostatistics (S.R.C., M.C.N., W.S.B., K.S., D.B.), University of California, San Francisco; the Department of Epidemiology and Preventive Medicine, University of Maryland, Baltimore (K.M.F.); the Division of Epidemiology, School of Public Health, University of Minnesota, Minneapolis (K.E.E.); the Department of Epidemiology, University of Pittsburgh, Pittsburgh (J.C.); and the Kaiser Permanente Center...