[1] Capital Med Univ, Beijing Tongren Hosp, Dept Ophthalmol, Beijing, Peoples R China
[2] Cent South China Univ, Dept Ophthalmol, Affiliated Hosp 2, Xiangya Med Sch, Changsha, Hunan, Peoples R China
[3] Univ Louisville, Sch Med, James Graham Brown Canc Ctr, Dept Ophthalmol & Visual Sci,Birth Defects Ctr, Louisville, KY 40292 USA