Smith V, Clarke M, Devane D, Begley C, Shorter G, Maguire L (2013)
SWAT 1: what effects do site visits by the principal investigator have on recruitment in a multicentre randomized trial? Journal of Evidence-Based Medicine 6(3), 136-137 https://onlinelibrary.wiley.com/doi/epdf/10.1111/jebm.12049
Introduction to the Study Within a Trial (SWAT) programme, to encourage the embedding of methodology research studies in randomised trials.
