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Welsing, Paco M; Oude Rengerink, Katrien; Collier, Sue; Eckert, Laurent; van Smeden, Maarten; Ciaglia, Antonio; Nachbaur, Gaelle; Trelle, Sven; Taylor, Aliki J; Egger, Matthias; Goetz, Iris; Consortium, Work Package 3 of the GetReal (2017). Outcome selection and measurement in pragmatic trials. Journal of clinical epidemiology, 90, pp. 99-107. Elsevier 10.1016/j.jclinepi.2016.12.022
