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Schoepfer, Alain M.; Dehlavi, Mohamed-Ali; Fournier, Nicolas; Safroneeva, Ekaterina; Straumann, Alex; Pittet, Valérie; Peyrin-Biroulet, Laurent; Michetti, Pierre; Rogler, Gerhard; Vavricka, Stephan R.; Müller, Christoph; IBD Cohort Study Group, (Müller C) (2013). Diagnostic delay in Crohn's disease is associated with a complicated disease course and increased operation rate. American journal of gastroenterology, 108(11), pp. 1744-1753. New York, N.Y.: Nature 10.1038/ajg.2013.248
