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