title: Heparin in vivo effect on free thyroxin.
mesh_terms: D000368:Aged; D005189:False Positive Reactions; D005260:Female; D006493:Heparin / Q000627:therapeutic use; D006801:Humans; D013974:Thyroxine / Q000097:blood*
chemical_list: D006493:Heparin; D013974:Thyroxine