title: Crohn's disease--a six year study.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003092:Colitis / Q000175:diagnosis; D003424:Crohn Disease / Q000175:diagnosis* / Q000453:epidemiology; D005260:Female; D006801:Humans; D007079:Ileitis / Q000175:diagnosis; D007494:Ireland; D008297:Male; D008875:Middle Aged