1. Department of Thoracic Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, China
2. Department of Anaesthetics, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, China
3. Intensive Care Unit, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, China
4. Center of Organ Transplantation, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, China
5. Department of Respiratory Medicine, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, China.