Additional file 4: of The effect of optimised patient information materials on recruitment in a lung cancer screening trial: an embedded randomised recruitment trial ParkerAdwoa KnappPeter TreweekShaun MadhurasingheVichithranie LittlefordRoberta GallantStephanie SullivanFrank SchembriStuart RickJo GraffyJonathan CollierDavid EldridgeSandra KennedyAnne BowerPeter 2018 Optimised patient information brochure. (DOCX 1720 kb)