title: Familial selective vitamin B 12  malabsorption.
mesh_terms: D005808:Genes, Recessive; D006801:Humans; D007408:Intestinal Absorption; D008286:Malabsorption Syndromes / Q000235:genetics*; D014805:Vitamin B 12 / Q000378:metabolism*
chemical_list: D014805:Vitamin B 12