[1] Methodist Hosp, Dept Ophthalmol, Houston, TX 77030 USA
[2] Weill Cornell Med Coll, Dept Ophthalmol, New York, NY USA
[3] Weill Cornell Med Coll, Dept Neurol, New York, NY USA
[4] Weill Cornell Med Coll, Dept Neurosurg, New York, NY USA
[5] Univ Iowa Hosp & Clin, Dept Ophthalmol, Iowa City, IA 52242 USA
[6] UTMB Galveston, Dept Ophthalmol, Galveston, TX USA