Cook, J., Hislop, J., Altman, D., Briggs, A., Fayers, P., Norrie, J., . . . Vale, L. (2014). Use of methods for specifying the target difference in randomised controlled trial sample size calculations: Two surveys of trialists' practice. SAGE Publications.

Cook, J., J. Hislop, D. Altman, A. Briggs, P. Fayers, J. Norrie, C. Ramsay, I. Harvey, and L. Vale. Use of Methods for Specifying the Target Difference in Randomised Controlled Trial Sample Size Calculations: Two Surveys of Trialists' Practice. SAGE Publications, 2014.

Cook, J., et al. Use of Methods for Specifying the Target Difference in Randomised Controlled Trial Sample Size Calculations: Two Surveys of Trialists' Practice. SAGE Publications, 2014.