title: A double isotope method to measure vitamin B 12 absorption.
mesh_terms: D002859:Chromium Isotopes; D003036:Cobalt Isotopes; D005243:Feces / Q000032:analysis; D006801:Humans; D008722:Methods; D011865:Radioisotope Dilution Technique; D011877:Radionuclide Imaging; D012546:Schilling Test; D014805:Vitamin B 12 / Q000032:analysis / Q000378:metabolism*
chemical_list: D002859:Chromium Isotopes; D003036:Cobalt Isotopes; D014805:Vitamin B 12