1. Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing, China
2. Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, Florida, USA
3. Research Institute of Ophthalamology, Giza, Egypt
4. Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University, Beijing, China
5. Beijing Municipal Key Laboratory of Clinical Epidemiology, Capital Medical University, Beijing, China
6. Beijing Eye Institute, Beijing Ophthalmology and Visual Science Key Laboratory, Beijing, China
7. Department of Neurology and Medical Research Center, Beijing Tongren Hospital, Capital Medical University, Beijing, China