1 Department of Special Minimally Invasive Surgery, The First Hospital of Lanzhou University, Gansu, China.
2 Department of Special Minimally Invasive Surgery, The First Hospital of Lanzhou University, Gansu, China; Department of Hepatopancreatobiliary Surgery, Institute of Gansu Province, Clinical Medical College Cancer Center of Lanzhou University, Gansu, China.
3 The First Clinical Medical College of Lanzhou University, Gansu, China.
4 Department of Hepatopancreatobiliary Surgery, Institute of Gansu Province, Clinical Medical College Cancer Center of Lanzhou University, Gansu, China; Department of The Fifth General Surgery, The First Hospital of Lanzhou University, Gansu, China.