1 Division of Cardiothoracic Surgery, Department of Surgery, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China. Electronic address: swan@surgery.cuhk.edu.hk.
2 Department of Cardiovascular Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
3 Department of Cardiovascular Surgery, Zhongshan Hospital, Fudan University, Shanghai, China.