Department of General Surgery The Second Affiliated Hospital of North Sichuan Medical College Mianyang 621000 China;
Department of General Surgery The Second Affiliated Hospital of North Sichuan Medical College Mianyang 621000 China;
Department of General Surgery The Second Affiliated Hospital of North Sichuan Medical College Mianyang 621000 China;
Department of General Surgery The Second Affiliated Hospital of North Sichuan Medical College Mianyang 621000 China;
Department of General Surgery The Second Affiliated Hospital of North Sichuan Medical College Mianyang 621000 China;