1. Department of Medical Oncology; Sun Yat-sen University Cancer Center; Guangzhou People's Republic of China
2. State Key Laboratory of Oncology in South China; Sun Yat-sen University Cancer Center, Collaborative Innovation Center for Cancer Medicine, Guangdong Esophageal Cancer Institute; Guangzhou People's Republic of China
3. Department of Medical Oncology; First Affiliated Hospital of Anhui Medical University; Hefei People's Republic of China
4. Department of Medical Oncology; Hunan Cancer Hospital; Changsha People's Republic of China
5. Department of Medical Oncology; Cancer Hospital of Shantou University Medical College; Shantou People's Republic of China
6. Department of Oncology; Fourth Hospital of Hebei Medical University; Shijiazhuang People's Republic of China
7. Department of Medical Oncology; Anhui Provincial Cancer Hospital; Bengbu People's Republic of China
8. Department of Oncology; Jiangsu Cancer Hospital; Nanjing People's Republic of China
9. Department of Oncology; Tangdu Hospital, Fourth Military Medical University; Xi'an People's Republic of China
10. Department of Oncology; Sichuan Provincial People's Hospital; Chengdu People's Republic of China
11. Department of Thoracic Surgery; Chongqing Cancer Hospital; Chongqing People's Republic of China
12. Department of Medical Oncology; Huai'an First People's Hospital; Huai'an People's Republic of China
13. Department of Medical Oncology; First People's Hospital of Foshan; Foshan People's Republic of China
14. Department of Thoracic Surgery; Shanghai Chest Hospital, Shanghai Jiaotong University; Shanghai People's Republic of China
15. Department of Oncology; First Affiliated Hospital of Nanchang University; Nanchang People's Republic of China
16. Department of Oncology; Shanghai 10 People's Hospital; Shanghai People's Republic of China