title: A second external quality control survey (EQCS) for serum triiodothyronine (T3) and thyroxine (T4) assays using the "Munich model".
mesh_terms: D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques / Q000592:standards; D011786:Quality Control; D011863:Radioimmunoassay / Q000592:standards; D011933:Reagent Kits, Diagnostic / Q000592:standards; D013223:Statistics as Topic; D013974:Thyroxine / Q000097:blood*; D014284:Triiodothyronine / Q000097:blood*; D014285:Triiodothyronine, Reverse / Q000097:blood
chemical_list: D011933:Reagent Kits, Diagnostic; D014284:Triiodothyronine; D014285:Triiodothyronine, Reverse; D013974:Thyroxine