... Burleyson GP, Tielsch JM, Cameron JL: The effects of regionalization on cost and outcome for one general high-risk surgicalprocedure. Ann Surg 1995, 221:43-49.7. Sosa JA, Bowman HM, Gordon TA, ... survivalThe mean follow up was 15.8 months in group A (median:12.0 months; range, 0.8-65.4 months) and 23.3 months in group B (median: 18.8 months; range, 1.3-59.5 months).The 1- and 3-year survival ... defined in this population, thedecision to perform an operation in an elderly patientcan be difficult [1]. Therefore, surgeons must give thisdecision careful consideration. Pancreaticoduodenectomy(PD),...