1 Department of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, Beijing, China.
2 Department of Ophthalmology, Second Affiliated Hospital of Xiangya Medical School, Central South China University, Changsha, Hunan Province, China.
3 James Graham Brown Cancer Center; Department of Ophthalmology and Visual Sciences; Birth Defects Center, University of Louisville School of Medicine, Louisville, KY, USA.