title: Crohn's disease epidemiology at the turn of the century-solving the puzzle.
authors.forename: M
authors.initials: M
authors.lastname: Alic
mesh_terms: D003424:Crohn Disease / Q000453:epidemiology* / Q000209:etiology / Q000266:history; D049673:History, 20th Century; D006801:Humans; D015994:Incidence; D012307:Risk Factors