title: Macrocytic anaemias. Three fifths of patients with Crohn's disease that has not been operated on have vitamin B12 malabsorption.
authors.forename: R
authors.initials: R
authors.lastname: Barton
mesh_terms: D000748:Anemia, Macrocytic / Q000209:etiology; D003424:Crohn Disease / Q000150:complications*; D006801:Humans; D008286:Malabsorption Syndromes / Q000209:etiology*; D014804:Vitamin B Deficiency / Q000209:etiology*