1. Department of Blood Transfusion, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
2. Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
3. Department of Hematopathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China