1. From the Department of Internal Medicine (L.N.S., A.N.M., S.R.D., E.A.H., O.K.N.), Department of Clinical Sciences (A.N.M., E.A.H., O.K.N.), and Health Sciences Digital Library and Learning Center (H.M.), UT Southwestern Medical Center, Dallas, TX; and Department of Internal Medicine, University of California San Diego, La Jolla (D.D.).