1. Department of Ophthalmology; LKS Faculty of Medicine; The University of Hong Kong; Hong Kong Hong Kong
2. Smt. Kanuri Santhamma Retina Vitreous Centre; L. V. Prasad Eye Institute; Hyderabad India
3. Department of Ophthalmology; People's Hospital; Peking University and Key Laboratory of Vision Loss and Restoration; Ministry of Education; Beijing China