1. Department of Ophthalmology, Peking University People's Hospital; College of Optometry, Beijing, China
2. University Health Science Center; Beijing Key Laboratory of Diagnosis and Therapy of Retinal and Choroid Diseases, Beijing, China
3. Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, China
4. Department of Ophthalmology, University of California, San Francisco, California, United States