1. From the Departments of Ophthalmology (N.W., A.M.S.) and Radiology (L.V.R.), Massachusetts Eye and Ear, the Departments of Ophthalmology (N.W., A.M.S.), Radiology (L.V.R.), and Pathology (A.M.S.), Harvard Medical School, the Departments of Radiology (L.V.R.) and Pathology (A.M.S.), Massachusetts General Hospital, the Department of Medicine, Boston Medical Center (C.V.E.), and the Department of Medicine, Boston University School of Medicine (C.V.E.) — all in Boston.