1. Department of Cardiovascular Surgery, Haikou Affiliated Hospital of Central South University Xiangya School of Medicine, Haikou, China
2. Department of Cardiovascular Surgery, The Second Xiangya Hospital of Central South University, Changsha, China
3. Department of Thoracic Surgery, ZhuJiang Hospital of Southern Medical University, Southern Medical University, Guangzhou, China
4. Department of Thoracic Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China