1. School of Life Science and Technology, Weifang Medical University, Weifang, Shandong 261053, P.R. China
2. Department of Transfusion, Jinan Zhangqiu District Maternal and Child Health Care Hospital, Jinan, Shandong 250200, P.R. China
3. Department of Hematology, The Affiliated Weihai Second Municipal Hospital of Qingdao University, Weihai, Shandong 264200, P.R. China