1 Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Ministry of Education, Department of Stem cell Transplantation, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.
2 Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Ministry of Education, Department of Hematology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.