4Parker SL,Tong T,Bolden S,et al.Cancer statistics[].CA A Cancer Journal for Clinicians.1996
5Boland GW,O’Malley ME,Saez M,et al.Pancreatic-phase versus portal vein-phase helical CT of the pancreas:optimal temporal window for evaluation ofpancreatic adenocarcinoma[J].Am J Roentgenol,1999,172(3):605-608.
6Loyer EM,David CL,Dubrow RA,et al.Vascular involvement in pancreatic adenocarcinoma:reassessment by thin-section CT[J].Abdom Imaging,1996,21(3):202-206.
7Lu DS,Reber HA,Krasny RM,et al.Local staging of pancreatic cancer:criteria for unresectability of major vessels as revealed by pancreatic-phase,thin-section helical CT[J].Am J Roentgenol,1997,168(6):1439-1443.
8Piper SN,Suttner SW,Schmidt CC,et al.Nefopam andclonidine in the prevention of postanaesthetic shivering[J].Anaesthesia,1999,54(7):695-699.
9Frank SM,Fleisher LA,Olson KF,et al.Multivariate determinants of early postoperative oxygen consumption in elderly patients.Effects of shivering,bodytemperature,andgender[J].Anesthesiology,1995,83(2):241-249.
10Machado MC,Penteado S,Cunha JE,et al.Pancreatic head tumors with portal vein involvement:an alternative surgical approach[J].Hepatogastroenterology,2001,48(41):1486.