[1] Univ Coll Dublin, Sch Med, Dublin, Ireland
[2] Univ Michigan, Michigan Med, Ann Arbor, MI USA
[3] Univ Cambridge, Dept Ophthalmol, Cambridge, England
[4] Moorfields Eye Hosp NHS Fdn Trust, London, England
[5] Baylor Coll Med, Ctr Space Med, Houston, TX USA
[6] Houston Methodist Hosp, Houston Methodist Res Inst, Houston, TX USA
[7] Weill Cornell Med, Dept Ophthalmol, New York, NY USA
[8] Weill Cornell Med, Dept Neurol, New York, NY USA
[9] Weill Cornell Med, Dept Neurosurg, New York, NY USA
[10] Univ Texas Med Branch, Dept Neurobiol, Galveston, TX USA
[11] Univ Texas MD Anderson Canc Ctr, Houston, TX USA
[12] Texas A&M Coll Med, Bryan, TX USA
[13] Univ Iowa Hosp & Clin, Dept Ophthalmol, Iowa City, IA 52246 USA