1. Jemal A, Siegel R, Ward E, Hao Y, Xu J, Thun MJ. Cancer statistics, 2009. CA Cancer J Clin 2009;59:225–249.
2. Altekruse SF, Kosary CL, Krapcho M, Neyman N, Aminou R, Waldron W, Ruhl J, Howlader N, Tatalovich Z, Cho H, Mariotto A, Eisner MP, Lewis DR, Cronin K, Chen HS, Feuer EJ, Stinchcomb DG, Edwards BK (eds). SEER cancer statistics review, 1975–2007, National Cancer Institute. Bethesda, MD, http://seer.cancer.gov/csr/1975_2007/ , based on November 2009 SEER data submission, posted to the SEER web site, 2010.
3. United States Census Bureau. Age and sex. http://factfinder.census.gov . Accessed April 21, 2010. 2006–2008.
4. Scurtu R, Bachellier P, Oussoultzoglou E, Rosso E, Maroni R, Jaek D. Outcome for pancreaticoduodenectomy for cancer in elderly patients. J Gastrointest Surg 2006;10:813–822.
5. Brozzetti S, Mazzoni G, Miccini M, Puma F, De Angelis M, Cassini D, Bettelli E, Tocchi A, Cavallaro A. Surgical treatment of pancreatic head carcinoma in elderly patients. Arch Surg 2006;141:137–142.