1 From the Department of Medicine, University of Maryland School of Medicine, Baltimore (B.A.M.); and the Department of Medicine, Brigham and Women's Hospital (B.A.M.), the Departments of Medicine (B.A.M., A.S.W., D.M.D., W.Z.), Radiology (A.S.S.-B.), and Pathology (S.G.S.), Harvard Medical School, and the Departments of Medicine (A.S.W., D.M.D., W.Z.), Radiology (A.S.S.-B.), and Pathology (S.G.S.), Massachusetts General Hospital - all in Boston.