1. Laboratory of Hematologic Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang 524001, P. R. China
2. School of Biology and Medicine, Shaanxi University of Science & Technology, Xi’an 710021, P. R. China
3. College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi’an 710021, P. R. China