title: Clinical features and natural history of inflammatory bowel disease.
mesh_terms: D000293:Adolescent; D000328:Adult; D003093:Colitis, Ulcerative / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D003113:Colonoscopy; D003424:Crohn Disease / Q000150:complications* / Q000601:surgery; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000209:etiology; D006801:Humans; D008297:Male; D011350:Proctocolitis / Q000175:diagnosis; D011379:Prognosis; D012008:Recurrence