title: Quality control in quantitative radioisotope procedures.
mesh_terms: D001811:Blood Volume Determination; D006801:Humans; D011786:Quality Control; D012546:Schilling Test / Q000592:standards*; D013974:Thyroxine / Q000592:standards*; D014284:Triiodothyronine / Q000592:standards*
chemical_list: D014284:Triiodothyronine; D013974:Thyroxine