[1]
G. . Baatrup, B. H. . Endreseth, V. . Isaksen, Äse . Kjellmo, K. Magne Tveit, and A. . Nesbakken, “Preoperative staging and treatment options in T1 rectal adenocarcinoma”, AO, vol. 48, no. 3, pp. 328–342, Jan. 2009.