[1]Department of Medical Microbiology, Qingdao University Medical College, Qingdao 266021, China;
[2]Department of Pathology, The Affiliated Hospital of Qingdao University.Qingdao 266003, China;
[3]Department of Blood Transfusion, The Affiliated Hospital of Qingdao University, Qingdao 266003, China;