1. Department of General Thoracic Surgery, The First Affiliated Hospital of Guangzhou Medical University, Jinping, Shantou, Guangzhou 515000, P.R. China
2. State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Jinping, Shantou, Guangzhou 515000, P.R. China
3. Department of Oncology, Shantou Central Hospital, Jinping, Shantou, Guangzhou 515000, P.R. China
4. Department of General Surgery, The First Affiliated Hospital of Shantou University Medical College, Jinping, Shantou, Guangdong 515041, P.R. China