RT Journal Article SR Electronic T1 Ophthalmic Statistics Note 4: analysing data from randomised controlled trials with baseline and follow-up measurements JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP bjophthalmol-2014-305614 DO 10.1136/bjophthalmol-2014-305614 A1 Rachel Nash A1 Catey Bunce A1 Nick Freemantle A1 Caroline J Doré A1 Chris A Rogers YR 2014 UL http://bjo.bmj.com/content/early/2014/08/07/bjophthalmol-2014-305614.abstract AB