1. From Division of Cardiology (A.P., C.A., D.J.K., J.A.d.L., J.D.B.), Department of Internal Medicine (D.D.), and Department of Clinical Sciences (C.A., J.D.B.), University of Texas Southwestern Medical Center, Dallas; Department of Internal Medicine, University of Minnesota School of Medicine, Minneapolis (S.G.); Department of Internal Medicine, Cleveland Clinic, OH (M.K.); and University of Texas Southwestern Medical Center Library, Dallas (H.G.M.).