American Gastroenterological Association medical position statement: perianal Crohn's disease.
D001004:Anus Diseases / Q000175:diagnosis* / Q000453:epidemiology / Q000209:etiology / Q000628:therapy*; D003424:Crohn Disease / Q000150:complications / Q000175:diagnosis* / Q000453:epidemiology / Q000628:therapy*; D006801:Humans; D015994:Incidence; D012003:Rectal Fistula / Q000175:diagnosis / Q000209:etiology / Q000601:surgery