title: Giardiasis and vitamin B 12 malabsorption.
mesh_terms: D005873:Giardiasis / Q000150:complications*; D006801:Humans; D008286:Malabsorption Syndromes / Q000209:etiology*; D014805:Vitamin B 12 / Q000378:metabolism*
chemical_list: D014805:Vitamin B 12