Medical Oncology Department,Pediatric Oncology Center,Beijing Children's Hospital,Capital Medical University,National Center for Children's Health,Beijing Key Laboratory of Pediatric Hematology Oncology,National Key Clinical Discipline of Pediatric Oncology,Key Laboratory of Major Disease in Children,Ministry of Education,Beijing 100045,China

Clinical Epidemiology and Evidence-based Medicine,National Center for Children's Health,Beijing Children's Health,Beijing Children's Hospital,Capital Medical University,Beijing 100045,China

Hematologic Disease Laboratory,Hematology Center,Beijing Key Laboratory of Pediatric Hematology Oncology,National Key Discipline of Pediatrics,Key Laboratory of Major Diseases in Children,Ministry of Education,Beijing Pediatric Research Institute,Beijing Children's Hospital,Capital Medical University,National Center for Children's Health,Beijing 100045,China