1. From the Department of Medicine, Indiana University School of Medicine, Indianapolis (M.J.E.); and the Departments of Medicine (D.J.S., H.M.K.), Radiology (R.B., O.Z.), and Pathology (Y.P.H.), Massachusetts General Hospital, and the Departments of Medicine (D.J.S., H.M.K.), Radiology (R.B., O.Z.), and Pathology (Y.P.H.), Harvard Medical School — both in Boston.