1 Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China.
2 Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China. lijian@pumch.cn.
3 State Key Laboratory of Common Mechanism Research for Major Diseases, Beijing, China. lijian@pumch.cn.