1. Retina Service, Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
2. Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
3. Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan, China
4. Harvard Medical School, Boston, MA, USA
5. Boston University School of Medicine, Boston, MA, USA