1 The First Clinical Medical School of Lanzhou University, Lanzhou, 730000, Gansu Province, People's Republic of China.
2 Department of Thoracic Surgery, The First Hospital of Lanzhou University, Lanzhou, 730000, People's Republic of China.
3 Department of Special Minimally Invasive Surgery, The First Hospital of Lanzhou University, Lanzhou, 730000, People's Republic of China.
4 The First Clinical Medical School of Lanzhou University, Lanzhou, 730000, Gansu Province, People's Republic of China. lixun2009@mail.com.
5 Department of General Surgery, The First Hospital of Lanzhou University, No. 1, Donggang West Road, Chengguan District, Lanzhou, 730000, Gansu Province, People's Republic of China. lixun2009@mail.com.