3Sener SF, Fremgen A,Menck HR, et al. Pancreatic cancer: a report of treatment and survival trends for 100 313 patients diag-nosed from 1985-1996, using National Cancer Datobase. J Am Coll Surg, 1999,189( 1 ): 1-7
4Gerdes B, Ramaswamg A, Kersting M, et al. p16(INK4a)alteration in chronic pancreatitis indication for high-risk lesions for pancreatic cancer. Surgery,2001,129(4):490-497
5Liflermore KD. Current managementof pancreatic carcinoma. Ann Surg. 1995,221:133