title: Follow-up time bias and Crohn's disease.
authors.forename: M
authors.initials: M
authors.lastname: Frisch
authors.forename: J
authors.initials: J
authors.lastname: Olsen
authors.forename: P K
authors.initials: PK
authors.lastname: Andersen
mesh_terms: D000328:Adult; D017668:Age of Onset; D015982:Bias; D002648:Child; D003424:Crohn Disease / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D005500:Follow-Up Studies; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D013997:Time Factors