Sakkestad ST, Olsen BC, Karliczek A, Dahl O, Pfeffer F. Validity of Norwegian Rectal Cancer Registry data at a major university hospital 1997–2005. AO [Internet]. 2015 Nov. 26 [cited 2026 May 20];54(10):1723-8. Available from: https://medicaljournalssweden.se/actaoncologica/article/view/26746