title: Occult gastrointestinal bleeding with anorexia nervosa.
mesh_terms: D000293:Adolescent; D000856:Anorexia Nervosa / Q000150:complications* / Q000453:epidemiology; D015897:Comorbidity; D004064:Digestive System / Q000098:blood supply* / Q000293:injuries; D015444:Exercise; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology*; D006760:Hospitalization; D006801:Humans; D009780:Occult Blood; D012420:Running / Q000293:injuries*