1. Dias J, Escher J. Inflammatory bowel disease in children and adolescents: recommendations for diagnosis-the Porto criteria. J Pediatr Gastroenterol Nutr. 2005;41:1–7.
2. Silverberg MS, Satsangi J, Ahmad T, Arnott ID, Bernstein CN, Brant SR, et al. Toward an integrated clinical, molecular and serological classification of inflammatory bowel disease: Report of a Working Party of the 2005 Montreal World Congress of Gastroenterology. Can J Gastroenterol Hepatol. 2005;19(Suppl A):5A–36.
3. Stange E, Travis S, Vermeire S, Beglinger C, Kupcinkas L, Geboes K, et al. European evidence based consensus on the diagnosis and management of Crohn’s disease: definitions and diagnosis. Gut. 2006;55 suppl 1:i1–15.
4. The IBD Standards Group. Standards for the healthcare of people who have inflammatory bowel disease. London: IBD Standards Group; 2013. http://www.bsg.org.uk/attachments/160_IBDstandards.pdf . Accessed 2 May 2017.
5. O’Connor M, Bager P, Duncan J, Gaarenstroom J, Younge L, Detre P, et al. N-ECCO Consensus statements on the European nursing roles in caring for patients with Crohn’s disease or ulcerative colitis. J Crohns Colitis. 2013;7(9):744–64.