title: Within-subject variation of thyroxine and triiodothyronine concentrations in serum.
authors: S D
authors: SD
authors: Vasikaran
mesh_terms: D006801:Humans; D013974:Thyroxine / Q000097:blood*; D014284:Triiodothyronine / Q000097:blood*
chemical_list: D014284:Triiodothyronine; D013974:Thyroxine