1. Department of Cardiothoracic Surgery; The Affiliated Hospital of Guilin Medical University; Guilin Guangxi China
2. Department of Cardiothoracic Surgery; The 2nd Affiliated Hospital of Guilin Medical University; Guilin Guangxi China
3. Department of Thoracic Surgery; Xiangya Hospital Cental South University; Changsha Hunan China
4. Department of Cardiothoracic Surgery; Nanxishan Hospital of Guangxi Province; Guilin Guangxi China