Content of health economics analysis plans (HEAPs) for trial-based economic evaluations: expert Delphi consensus survey by Thorn, JC, Davies, CF, Brookes, ST, Noble, SM, Dritsaki, M, Gray, E, Hughes, DA, Mihaylova, B, Petrou, S, Ridyard, C, Sach, T, Wilson, ECF, Wordsworth, S, Hollingworth, W

Practical help for specifying the target difference in sample size calculations for RCTs: the DELTA2 five-stage study, including a workshop by Cook, JA, Julious, SA, Sones, W, Hampson, LV, Hewitt, C, Berlin, JA, Ashby, D, Emsley, R, Fergusson, DA, Walters, SJ, Wilson, ECF, Maclennan, G, Stallard, N, Rothwell, JC, Bland, M, Brown, L, Ramsay, CR, Cook, A, Armstrong, D, Altman, D, Vale, LD

DELTA2 guidance on choosing the target difference and undertaking and reporting the sample size calculation for a randomised controlled trial by Cook, J, Julious, SA, Sones, WR, Hampson, LV, Hewitt, C, Berlin, JA, Ashby, D, Emsley, R, Fergusson, DA, Walters, SJ, Wilson, ECF, Maclennan, G, Stallard, N, Rothwell, JC, Bland, M, Brown, L, Ramsay, CR, Cook, A, Armstrong, D, Altman, D, Vale, LD