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Hugin S, Johnson E, Johannessen HO, Hofstad B, Olafsen K, Mellem H.Hugin S, et al. Among authors: hofstad b.Int J Surg Case Rep. 2015;17:31-5. doi: 10.1016/j.ijscr.2015.10.023. Epub 2015 Oct 21.Int J Surg Case Rep. 2015.PMID: 26520033Free PMC article.
Gondal G, Johnson E, Johannessen HO, Hofstad B.Gondal G, et al. Among authors: hofstad b.Tidsskr Nor Laegeforen. 2008 May 1;128(9):1050-2.Tidsskr Nor Laegeforen. 2008.PMID: 18451885Free article.Norwegian.
Hoff G, Grotmol T, Skovlund E, Bretthauer M; Norwegian Colorectal Cancer Prevention Study Group.Hoff G, et al.BMJ. 2009 May 29;338:b1846. doi: 10.1136/bmj.b1846.BMJ. 2009.PMID: 19483252Free PMC article.Clinical Trial.