Affiliation: | 1. Department of Thoracic Surgery, The First Affiliated hospital, Sun Yat‐Sen University, Guangzhou, P. R. China;2. Department of Cardiothoracic Surgery, The Third Affiliated Hospital, Sun Yat‐sen University, Guangzhou, P. R. China;3. Department of Anesthesiology, The First Affiliated Hospital, Sun Yat‐sen University, Guangzhou, P. R. China |