title: Radioactive vitamin B12 absorption studies in various gastrointestinal disorders.
mesh_terms: D005767:Gastrointestinal Diseases / Q000150:complications*; D006801:Humans; D008286:Malabsorption Syndromes / Q000150:complications / Q000175:diagnosis*; D012546:Schilling Test; D014805:Vitamin B 12
chemical_list: D014805:Vitamin B 12