Assessing methods to specify the target difference for a randomised controlled trial: DELTA (Difference ELicitation in TriAls) review

Jonathan A. Cook, Jennifer Hislop, Temitope E. Adewuyi, Kirsten Harrild, Douglas G. Altman, Craig R. Ramsay, Cynthia Fraser, Brian Buckley, Peter Fayers, Ian Harvey, Andrew H. Briggs, John D. Norrie, Dean Fergusson, Ian Ford, Luke D. Vale