1. Department of Pathology, Qingdao Municipal Hospital, Qingdao, Shandong 266071, P.R. China
2. Department of Pathology, School of Basic Medicine, Qingdao University, Qingdao, Shandong 266071, P.R. China
3. Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
4. Department of Sports Medicine, Qingdao Municipal Hospital, Qingdao, Shandong 266071, P.R. China
5. Department of Central Laboratories, Qingdao Municipal Hospital, Qingdao, Shandong 266071, P.R. China