title: [Malabsorption of vitamin B 12. Report of a case of 34-month-old boy, and studies of B 12 absorption].
mesh_terms: D000748:Anemia, Macrocytic / Q000209:etiology*; D002675:Child, Preschool; D006801:Humans; D007408:Intestinal Absorption; D008286:Malabsorption Syndromes / Q000150:complications*; D008297:Male; D014805:Vitamin B 12 / Q000378:metabolism*
chemical_list: D014805:Vitamin B 12