1. From the Division of General Internal Medicine, Johns Hopkins School of Medicine, Baltimore, MD (E.R.M., L.J.A.); Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD (E.R.M., L.J.A.); and Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins School of Medicine and Bloomberg School of Public Health, Baltimore, MD (E.R.M., L.J.A.).