1. Department of Cardio‑Thoracic Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
2. Department of Thoracic Surgery, Liuzhou People's Hospital Affiliated to Guangxi Medical University, Liuzhou, Guangxi Zhuang Autonomous Region 545026, P.R. China
3. Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China