title: Autoantibodies to thyroxin and interference with free-thyroxin assay.
mesh_terms: D000368:Aged; D001323:Autoantibodies / Q000276:immunology*; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D013974:Thyroxine / Q000097:blood* / Q000276:immunology
chemical_list: D001323:Autoantibodies; D013974:Thyroxine