1. From the Department of Medicine (A.C., E.B.-C., D.D., B.B., S.N., D.D.S., J.E.M., G.F.T.) and the Welch Center for Prevention, Epidemiology and Clinical Research (Y.Z., E.G.), Johns Hopkins Medical Institutions, Baltimore, MD; Washington Hospital Center, DC (Z.E.); Medical College of Virginia, Richmond (K.A.E.); and University of Maryland, Baltimore (T.D.).