1 From the Department of Medicine, Brigham and Women's Hospital (A.S.D.), the Departments of Medicine (D.M.D., S.T.C., C.N.-C., K.G.B.), Radiology (M.T.S.), Dermatology (S.T.C.), and Pathology (J.R.S.), Massachusetts General Hospital, and the Departments of Medicine (D.M.D., S.T.C., C.N.-C., K.G.B.), Radiology (M.T.S.), Dermatology (S.T.C.), and Pathology (J.R.S.), Harvard Medical School - all in Boston.