title: Are there epidemiological differences between Crohn's disease and ulcerative colitis?
authors.affiliation: Division of Gastroenterology, McMaster University, Ontario, Canada.
authors.forename: John K
authors.initials: JK
authors.lastname: Marshall
mesh_terms: D003093:Colitis, Ulcerative / Q000453:epidemiology* / Q000235:genetics / Q000473:pathology; D003424:Crohn Disease / Q000453:epidemiology* / Q000235:genetics / Q000473:pathology; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D015994:Incidence; D008297:Male; D015995:Prevalence; D012307:Risk Factors; D012737:Sex Factors; D012907:Smoking