1 Department of Cardiovascular Surgery, First Affiliated Hospital of Anhui Medical University, Hefei, 230032, China.
2 Department of Cardiovascular Surgery, Zhongshan Hospital, Fudan University, Shanghai, China.
3 Department of Cardiovascular Surgery, First Affiliated Hospital of Anhui Medical University, Hefei, 230032, China. Electronic address: zhangchengxin@ahmu.edu.cn.