Progress in laboratory testing of thyroid disease

Isotope Dilution-Gas Chromatography/Mass Spectrometry and Liquid Chromatography/Electrospray Ionization-Tandem Mass Spectrometry for the determination of triiodo-L-thyronine in serum.

Thienpont LMR, Fierens C, De Leenheer AP, Przywara L. Rapid Commun Mass Spectrom 1999;13:1924-31.