1. From the Department of Medicine, Brigham and Women’s Hospital (P.A., S.K.), the Departments of Radiology (A.P.H.), Medicine (S.K.), and Pathology (M.K.-W.), Massachusetts General Hospital, the Departments of Radiology (A.P.H.), Population Medicine (S.K.), and Pathology (M.K.-W.), Harvard Medical School, and the Department of Population Medicine, Harvard Pilgrim Health Care Institute (S.K.) — all in Boston.