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Bretthauer M, Lynge AB, Thiis-Evensen E, Hoff G, Fausa O, Aabakken L.Bretthauer M, et al.Endoscopy. 2005 Aug;37(8):706-9. doi: 10.1055/s-2005-870154.Endoscopy. 2005.PMID: 16032487Clinical Trial.