Neil R. Powe, M.D., M.P.H., M.B.A., is professor of medicine, epidemiology, and health policy and management and director of the Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins University, Baltimore, Maryland. He is a board-certified general internist, health services researcher, and epidemiologist. Dr. Powe received his M.D. and M.P.H. degrees from Harvard and M.B.A. from the Wharton School of the University of Pennsylvania. His interests include improvement of health and health care disparities in chronic disease.