1. Department of Hematology; The First Affiliated Hospital of Guangxi Medical University; Nanning China
2. Department of Pediatrics; The Affiliated Hospital of Southern Medical University; Guangzhou China
3. Department of Pediatrics; Sun Yat-sen Memorial Hospital, Sun Yat-sen University; Guangzhou China
4. Department of Pediatrics; The Second People's Hospital of Shenzhen; Shenzhen China
5. Novartis Pharmaceuticals Corp; East Hanover NJ USA
6. Novartis Pharma AG; Basel Switzerland
7. Department of Hematology; Ruijin Hospital, Affiliated Hospital of Shanghai Jiao Tong University; Shanghai China