1. Department of Thoracic Surgery, The First People's Hospital of Lianyungang, Lianyungang, Jiangsu 222000, P.R. China
2. Department of Thoracic Surgery, The Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, Henan 450008, P.R. China
3. Department of Thoracic Surgery, Sun Yat‑Sen Memorial Hospital, Sun Yat‑Sen University, Guangzhou, Guangdong 510120, P.R. China