Can an educational video improve the adequacy of bowel preparation for patients undergoing their first colonoscopy? Results of the EBOPS RCT oleh Thomas Archer, Bernard Corfe, Keith Dear, Andy Cole, Stephen Foley, H Jervoise N Andreyev, Waleed Fateen, Andrew Baxter, Stuart Riley, The EBOPS study group, Adolfo Parra-Blanco, Mo Thoufeeq