1. Department of Paediatrics The Chinese University of Hong Kong Hong Kong Children’s Hospital Hong Kong China
2. Department of Hematology/Oncology Shanghai Children’s Medical Centre Shanghai Jiao‐Tong University School of Medicine National Center for Children’s Health China
3. Hematology Oncology Center Beijing Children’s Hospital Capital Medical University National Center for Children’s Health China
4. Department of Pediatrics Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou China
5. Department of Pediatric Oncology Sun Yat‐Sen University Cancer Center Guangzhou China