1. Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
2. Key Laboratory of Ocular Fundus Diseases, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
3. Doheny Eye Institute, Pasadena, California, United States
4. Department of Ophthalmology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States