Free thyroxine results are affected by albumin concentration and nonthyroidal illness.
D000328:Adult; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011863:Radioimmunoassay / Q000592:standards; D011933:Reagent Kits, Diagnostic / Q000592:standards*; D012709:Serum Albumin / Q000378:metabolism*; D012710:Serum Albumin, Bovine / Q000494:pharmacology; D013974:Thyroxine / Q000097:blood*
D011933:Reagent Kits, Diagnostic; D012709:Serum Albumin; D012710:Serum Albumin, Bovine; D013974:Thyroxine