1. Department of Inspection, Medical Faculty of Qingdao University, Qingdao, Shandong 266003, P.R. China
2. Center for Developmental Cardiology, Institute of Translational Medicine, College of Medicine, Qingdao University, Qingdao, Shandong 266021, P.R. China
3. Clinical Laboratory, Qingdao Hiser Medical Center, Qingdao, Shandong 266034, P.R. China
4. Department of Thoracic Surgery, Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
5. Clinical Laboratory Blood Transfusion Service, Qingdao Municipal Hospital, Qingdao, Shandong 266011, P.R. China