1 1 Department of Thoracic Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, China ; 2 Department of Thoracic Surgery, Guangdong Esophageal Cancer Institute, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou 510060, China ; 3 Department of Thoracic Surgery, Affiliated Hospital of Qingdao University, Qingdao 266001, China ; 4 Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China ; 5 Department of Endocrinology, Tianjin Medical University General Hospital, Tianjin 300052, China ; 6 Department of Thoracic Surgery, Sichuan Cancer Hospital, Chengdu 610041, China ; 7 Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, China ; 8 Department of Thoracic Surgery, First Affiliated Hospital of Anhui Medical University, Hefei 230022, China ; 9 Department of Thoracic Surgery, Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou 450008, China ; 10 Department of Thoracic Surgery, Beijing Cancer Hospital, Beijing 100142, China ; 11 Department of Cardiothoracic Surgery, Changhai Hospital, Shanghai 200433, China ; 12 Department of Thoracic Surgery, Liaoning Cancer Hospital, Shenyang 110042, China ; 13 Department of Thoracic Surgery, First Affiliated Hospital of Jilin University, Changchun 130021, China ; 14 Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China ; 15 Department of Thoracic Surgery, Huashan Hospital, Fudan University, Shanghai 200032, China ; 16 Department of Esophageal Cancer, Tianjin Cancer Hospital, Tianjin 300060, China ; 17 Department of Thoracic Surgery, Zhejiang Cancer Hospital, Hangzhou 310022, China ; 18 Department of Thoracic Surgery, Jiangxi People's Hospital, Nanchang 330006, China ; 19 Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China.