1. State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, P.R. China.
2. Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, P.R. China.
3. Department of Pharmacology, Shanxi Medical University, Shanxi 030001, P.R. China.