1. From the Departments of Ophthalmology (D.R.L., M.K.Y.) and Radiology (K.L.R.), Massachusetts Eye and Ear, the Departments of Medicine (J.H.S.) and Pathology (A.M.S.), Massachusetts General Hospital, and the Departments of Ophthalmology (D.R.L., M.K.Y.), Radiology (K.L.R.), Medicine (J.H.S.), and Pathology (A.M.S.), Harvard Medical School — all in Boston.