Affiliation: | aDepartment of Thoracic Surgery, Sun Yat-sen University Cancer Center, Guangzhou City, Guangdong Province, China;bState Key Laboratory of Oncology in South China, Guangzhou City, Guangdong Province, China;cDepartment of Thoracic Surgery, Linzhou Esophageal Cancer Hospital, Yaocun Town, Linzhou City, Henan Province, China;dInstitute of Medical Statistics and Epidemiology, Guangdong Pharmaceutical University, Guangzhou City, Guangdong Province, China |