1. Hematology Oncology Center, Beijing Children’s Hospital, Capital Medical University, National center for children’s health, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics, Ministry of Education, MOE Key Laboratory of Major Diseases in Children, Beijing, China
2. Center for Clinical Epidemiology and Evidence-based Medicine, Beijing Children’s Hospital, Capital Medical University, National center for children’s health, Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing, China
3. Ophthalmology Department, Beijing Children’s Hospital, Capital Medical University, National center for children’s health, Beijing, China