
Keywords: Thyroid hormone metabolites; Tandem mass spectrometry; 3-Iodothyronamine; Iodothyronine; CLIA; Chemiluminescence immunoassays; 3,5-T2; 3,5-Diiodo-L-thyronine; 3,3â²-T2; 3,3'-Diiodo-L-thyronine; ELISA; Enzyme-linked immunosorbent assay; FDA; Food and Dr