1. Department of Hematology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
2. Department of Resoiratory and Critical Care Medicine, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
3. Department of General Surgery, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
4. Department of Pathology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China