Progress in laboratory testing of thyroid disease

Isotope Dilution-Liquid Chromatography/Electrospray Ionization-Tandem Mass Spectrometry for the determination of serum thyroxine as a potential reference method.

De Brabandere VI, Hou P, Stöckl D, Thienpont LM, De Leen­heer AP. Rapid Commun Mass Spectrom 1998;12:1099-03.