1. Hausmann J, Blumenstein I (2015) Gender differences and inflammatory bowel disease. Z Gastroenterol 53(8):774–778
2. Brahme F, Lindstrom C, Wenckert A (1975) Crohn’s disease in a defined population. An epidemiological study of incidence, prevalence, mortality, and secular trends in the city of Malmo, Sweden. Baillieres Clin Gastroenterol 69(2):342–351
3. Kyle J (1992) Crohn’s disease in the northeastern and northern Isles of Scotland: an epidemiological review. Baillieres Clin Gastroenterol 103(2):392–399
4. Latour P, Louis E, Belaiche J (1998) Incidence of inflammatory bowel disease in the area of Liege: a 3 years prospective study (1993–1996). Acta Gastroenterol Belg 61(4):410–413
5. Leong RW, Lau JY, Sung JJ (2004) The epidemiology and phenotype of Crohn’s disease in the Chinese population. Inflamm Bowel Dis 10(5):646–651