Evolution of pancreatic surgery over time and effects of centralization—a single-center retrospective cohort study - Nortunen, Minna; Meriläinen, Sanna; Ylimartimo, Aura; Peroja, Pekka; Karjula, Heikki; Niemelä, Jarmo; Saarela, Arto; Huhta, Heikki (Journal of Gastrointestinal Oncology, 2023)