1. Institute of Hematology & Hospital of Blood Diseases, State Key Laboratory of Experimental Hematology, Chinese Academy of Medical Sciences & Peking Union of Medical College, Tianjin, People's Republic of China.
2. Tianjin Cord Blood Bank of National Research Center for Stem Cell Engineering and Technology, Tianjin, People's Republic of China.
3. Department of Pathology, Tianjin Medical University Cancer Hospital, Tianjin, People's Republic of China.