Tran, K.T.

patient group pppd group resection study pancreatic sw group ann surg postoperative survival blood loss whipple randomized operation hospital surgery blood periampullary procedure pylorus-preserving pancreaticoduodenectomy br j surg difference mortality pylorus-preserving cancer month margin operation time number adenocarcinoma tumor pyloru center 2004 lippincott williams follow-up whipple procedure pancreatic cancer result weight disease-free survival periampullary adenocarcinoma complication trial survival rates table incidence morbidity netherland university hospital maastricht multicenter range randomized multicenter study treatment analysis randomized study william volume nasogastric pylorus-preserving pancreatoduodenectomy 2 groups november lippincott annals cameron jl retroperitoneal lymphadenectomy wilkin duodenum adjuvant preoperative carcinoma rotterdam disease-free sw resection j gastrointest surg center rotterdam longmire wp jr preservation sw resection group pancreas postoperative weight loss