Department of Ophthalmology, Ninth People's Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China. Medical Oncology Department, Pediatric Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China. Department of Interventional Radiology and Vascular Anomalies, Guangzhou Women and Children's Medical Center, Guangzhou, China. Department of Ophthalmology, Xinhua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China. Department of Ophthalmology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China. Eye Center of Xiangya Hospital and Hunan Key Laboratory of Ophthalmology, Central South University, Changsha, China. Senior department of Ophthalmology, the third medical center of Chinese PLA General Hospital, Beijing, China. Department of Interventional Radiology and Vascular Anomalies, Guangzhou Women and Children's Medical Center, Guangzhou, China; Department of Interventional Radiology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China. National Center for Pediatric Center Surveillance, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China. Department of Ophthalmology, Ninth People's Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China. Electronic address: fanxq@sjtu.edu.cn.