1. Beijing Tongren Eye Center; Beijing Tongren Hospital; Beijing Ophthalmology & Visual Science Key Lab; Beijing Institute of Ophthalmology; Capital Medical University; Beijing China
2. National Clinical Research Center for Digestive Diseases; Beijing Friendship Hospital; Capital Medical University; Beijing China
3. Anyang Eye Hospital; Henan Province China
4. Department of Biostatistics and Epidemiology; School of Public Health; Capital Medical University; Beijing China
5. Lakewood Eye Care; Houston USA