1. Department of Hematology and Institute of Hematology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
2. Department of Hematology, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421001, P.R. China
3. Department of Hematology, The First Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
4. Department of Hematology, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai 200940, P.R. China