title: Measurement of oral calcium absorption from the gut by external isotope counting.
mesh_terms: D000284:Administration, Oral; D002118:Calcium / Q000378:metabolism / Q000652:urine; D002127:Calcium Isotopes; D002128:Calcium Metabolism Disorders / Q000378:metabolism; D006801:Humans; D007011:Hypoparathyroidism / Q000378:metabolism; D007408:Intestinal Absorption; D011874:Radiometry; D014545:Urinary Calculi / Q000378:metabolism
chemical_list: D002127:Calcium Isotopes; D002118:Calcium