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Zuidgeest, Mira G; Welsing, Paco; van Thiel, Ghislaine; Ciaglia, Antonio; Alfonso-Cristancho, Rafael; Eckert, Laurent; Eijkemans, Marinus J C; Egger, Matthias (2017). Series: Pragmatic trials and real world evidence: Paper 5. Usual care and real life comparators. Journal of clinical epidemiology, 90, pp. 92-98. Elsevier 10.1016/j.jclinepi.2017.07.001
