title: Reply to letter: "Retrospective studies and pancreatic adenocarcinoma: how far can we backdate?".
authors.affiliation: Department of Surgery, Massachusetts General Hospital, Boston, MA cferrone@partners.org.
authors.forename: Ioannis T
authors.initials: IT
authors.lastname: Konstantinidis
authors.forename: Cristina R
authors.initials: CR
authors.lastname: Ferrone
mesh_terms: D000230:Adenocarcinoma / Q000601:surgery*; D021441:Carcinoma, Pancreatic Ductal / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D010180:Pancreatectomy / Q000379:methods*; D010190:Pancreatic Neoplasms / Q000601:surgery*