1. From Harvard Kennedy School of Government, Cambridge (R.P.W.), and Harvard T.H. Chan School of Public Health (R.P.W.), Harvard Business School (R.P.W.), the Departments of Medicine (M.V.B., K.M.T., D.M.D.), Radiology (J.-A.O.S.), and Pathology (D.C.S.), Massachusetts General Hospital, and the Departments of Medicine (M.V.B., K.M.T., D.M.D.), Radiology (J.-A.O.S.), and Pathology (D.C.S.), Harvard Medical School, Boston — all in Massachusetts.