1. From the Departments of Radiology (A.G., J.L.C., M.H., N.A., P.C.S.) and Neurology (A.Z.S., H.K., D.L.), Weill Cornell Medical College, New York–Presbyterian Hospital, New York, NY; Samuel J. Wood Library & C.V. Starr Biomedical Information Center, Weill Cornell Medical College, New York, NY (D.D.); and the Department of Public Health, Weill Cornell Medical College, New York, NY (H.S., M.M., P.C.S.).