作者单位:Emory Univ, Dept Ophthalmol, Atlanta, GA 30322 USA[1]Univ Calif San Francisco, Francis I Proctor Fdn, 95 Kirkham St, San Francisco, CA 94122 USA[2]Kaiser Permanente, Dept Ophthalmol, Oakland, CA USA[3]Univ Calif San Francisco, Weill Inst Neurosci, San Francisco, CA 94143 USA[4]