Use of methods for specifying the target difference in randomised controlled trial sample size calculations : Two surveys of trialists' practice

Cook, J A, Hislop, J M, Altman, D G, Briggs, A H, Fayers, P M, Norrie, J D, Ramsay, C R, Harvey, I M, Vale, L D & DELTA group 2014, 'Use of methods for specifying the target difference in randomised controlled trial sample size calculations : Two surveys of trialists' practice', Clinical Trials, vol. 11, no. 3, pp. 300-308. https://doi.org/10.1177/1740774514521907