1. Department of Immunology, School of Basic Medical Sciences, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
2. Department of Laboratory Medicine, Fushan District People's Hospital, Yantai, Shandong 265500, P.R. China
3. Department of Laboratory Medicine, Zibo First Hospital, Zibo, Shandong 255200, P.R. China
4. Department of Hematology, The First Affiliated Hospital of Shandong First Medical University (Shandong Academy of Medical Sciences), Jinan, Shandong 250062, P.R. China