Practical help for specifying the target difference in sample size calculations for RCTs : The DELTA2 five-stage study, including a workshop

Cook, J A, Julious, S A, Sones, W, Hampson, L V, Hewitt, C, Berlin, J A, Ashby, D, Emsley, R, Fergusson, D A, Walters, S J, Wilson, E C F, Maclennan, G, Stallard, N, Rothwell, J C, Bland, M, Brown, L, Ramsay, C R, Cook, A, Armstrong, D, Altman, D & Vale, L D 2019, 'Practical help for specifying the target difference in sample size calculations for RCTs : The DELTA 2 five-stage study, including a workshop', Health Technology Assessment, vol. 23, no. 60. https://doi.org/10.3310/hta23600