1. Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
2. Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
3. Cancer Research Institute, Key Laboratory of Carcinogenesis, Ministry of Health, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
4. Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China