2[2]Delcore R,Thomas JH,Forstrer J,et al.Improving re-sectability and survival in patients with primary duodenal,carcinoma[J].Am J Surg,1993,166:626.
3[3]Michelassi F,Errii F,Dawson PJ,et al.Experience with 647 consecutive tumors the duodenum,ampulla,head of the pancreas,and distal common bile duct[J].Ann Surg,1989,210:544.