1. From the Department of Internal Medicine, Yale School of Medicine, New Haven, CT (M.M.A.); and the Departments of Radiology (V.V.M.), Pathology (J.A.V., S.E.T.), and Medicine (S.E.T.), Massachusetts General Hospital, and the Departments of Radiology (V.V.M.), Pathology (J.A.V., S.E.T.), and Medicine (S.E.T.), Harvard Medical School — both in Boston.