1. Stange EF, Travis SPL, Vermeire S et al; European Crohn’s and Colitis Organisation (ECCO) (2008) European evidence-based Consensus on the diagnosis and management of ulcerative colitis: definitions and diagnosis. J Crohns Colitis 2(1):1–23
2. Mowat C, Cole A, Windsor A et al; IBD Section of the British Society of Gastroenterology (2011) Guidelines for the management of inflammatory bowel disease in adults. Gut 60(5):571–607
3. Delpre G, Avidor I, Steinherz R et al (1989) Ultrastructural abnormalities in endoscopically and histologically normal and involved colon in ulcerative colitis. Am J Gastroenterol 84(9):1038–1046
4. Geboes K, Dalle I (2002) Influence of treatment on morphological features of mucosal inflammation. Gut 50 (Suppl 3):III37–III42
5. Wiernicka A, Szymanska S, Cielecka-Kuszyk J et al (2015) Histological healing after infliximab induction therapy in children with ulcerative colitis. World J Gastroenterol 21(37):10654–10661