Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) TRAN KT,"Pylorus preserving pancreaticoduodenectomy versus standard Whipple procedure : a prospective, randomized, multicenter analysis of 170 patients with pancreatic and periampullary tumors",Ann Surg,,,2002,236,,422-428,https://cir.nii.ac.jp/crid/1573950401097642624,