George, A J T, Collett, C, Carr, AJ, Holm, S, Bale, C, Burton, S, Campbell, M, Coles, A, Gottlieb, G, Muir, K, Parroy, S, Price, J, Rice, ASC, Sinden, J, Stephenson, C, Wartolowska, K & Whittall, H 2016, ' When should placebo surgery as a control in clinical trials be carried out? ', Royal College of Surgeons of England. Bulletin, vol. 98, no. 2, pp. 75-79 . https://doi.org/10.1308/rcsbull.2016.75