1. Department of Ophthalmology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong
2. Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing
3. Casey Eye Institute, Oregon Health & Science University, Portland, Oregon, United States
4. School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong
5. Singapore National Eye Center, Singapore
6. Department of Ophthalmology, Hong Kong Sanatorium & Hospital, Hong Kong