1. From the Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Science Key Lab, Beijing, China; the 2Handan Eye Hospital, Hebei Province, China; the 3Wilmer Eye Institute, Johns Hopkins Universi
2. the Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland; and the 4Department of International Health, Johns Hopkins Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland.
3. From the Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Science Key Lab, Beijing, China;
4. the Handan Eye Hospital, Hebei Province, China;