title: Analog vs non-analog free T4 assay: effect of sample dilution.
mesh_terms: D001665:Binding Sites; D005188:False Negative Reactions; D006801:Humans; D007201:Indicator Dilution Techniques; D011863:Radioimmunoassay / Q000379:methods; D013974:Thyroxine / Q000031:analogs & derivatives* / Q000097:blood
chemical_list: D013974:Thyroxine