1. Department of Cardiothoracic Surgery, Jinling Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
2. Department of Cardiothoracic Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210002, P.R. China
3. Department of Laboratory Medicine of Jiangsu University, Zhenjiang, Jiangsu 212013, P.R. China