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APA Citation
Travis, S., Satsangi, J., & Lémann, M. (2011). predicting the need for colectomy in severe ulcerative colitis: a critical appraisal of clinical parameters and currently available biomarkers. Gut, 60(1), 3–9. http://access.bl.uk/ark:/81055/vdc_100135164461.0x00003a