title: Use of chromatography tubes in the separation of bound and free fractions in radioimmunoassay.
mesh_terms: D002845:Chromatography / Q000379:methods; D004077:Digoxin / Q000097:blood; D006728:Hormones / Q000032:analysis*; D006801:Humans; D010928:Placental Lactogen / Q000097:blood; D011142:Polyvinyl Alcohol; D011863:Radioimmunoassay / Q000379:methods*; D013974:Thyroxine / Q000097:blood; D014284:Triiodothyronine / Q000097:blood
chemical_list: D006728:Hormones; D014284:Triiodothyronine; D004077:Digoxin; D011142:Polyvinyl Alcohol; D010928:Placental Lactogen; D013974:Thyroxine