1. Panaccione R. Mechanisms of inflammatory bowel disease. Gastroenterol Hepatol (N Y). 2013;9(8):529–32.
2. Zhou N, Chen WX, Chen SH, Xu CF, Li YM. Inflammatory bowel disease unclassified. J Zhejiang Univ Sci B. 2011;12(4):280–6.
3. Vavricka SR, Schoepfer A, Scharl M, Lakatos PL, Navarini A, Rogler G. Extraintestinal manifestations of inflammatory bowel disease. Inflamm Bowel Dis. 2015;21(8):1982–92.
4. Bernstein C, Eliakim A, Fedail S, et al. Inflammatory bowel disease. World Gastroenterology Organisation Global Guidelines. Milwaukee: WGO; 2015.
5. Molodecky NA, Kaplan GG. Environmental risk factors for inflammatory bowel disease. Gastroenterol Hepatol (N Y). 2010;6(5):339–46.