1. Department of Clinical Laboratory, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266000, P.R. China
2. Department of Cardiology, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
3. Key Laboratory of Medical Science and Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212013, P.R. China