1 Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu, China; Department of Thoracic Surgery, Affiliated Hospital of North Sichuan Medical College, Nanchong, China.
2 Department of Thoracic Surgery, Affiliated Hospital of North Sichuan Medical College, Nanchong, China.
3 Department of Thoracic Surgery, West China Hospital, Sichuan University, 37 Guo Xue Xiang, Chengdu, 610041, China. Electronic address: drchenlq@scu.edu.cn.