1. Department of Thoracic Surgery, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China
2. Department of Thoracic Surgery, The 2nd Affiliated Hospital of Chengdu Medical College, Chengdu, China
3. Department of Thoracic Surgery, Sichuan Cancer Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China