title: Vitamin B 12 deficiency in cystic fibrosis.
mesh_terms: D000293:Adolescent; D003550:Cystic Fibrosis / Q000150:complications* / Q000378:metabolism; D005260:Female; D006801:Humans; D007408:Intestinal Absorption; D014805:Vitamin B 12 / Q000378:metabolism; D014806:Vitamin B 12 Deficiency / Q000209:etiology*
chemical_list: D014805:Vitamin B 12