title: Serum free thyroxine methods. A comparative study.
mesh_terms: D000328:Adult; D000368:Aged; D002850:Chromatography, Gel; D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011863:Radioimmunoassay; D011933:Reagent Kits, Diagnostic; D013959:Thyroid Diseases / Q000097:blood; D013974:Thyroxine / Q000097:blood*
chemical_list: D011933:Reagent Kits, Diagnostic; D013974:Thyroxine