Progress in laboratory testing of thyroid disease

Measurement of Free Thyroxine in Laboratory Medicine – Proposal of Measurand Definition.

Thienpont LM, Beastall G, Christofides ND, Faix JD, Ieiri T, Miller WG, Miller R, Nelson JC, Ross HA,  Ronin C, Rottmann M, Thijssen JH, Toussaint B. Clin Chem Lab Med 2007;45:563-4.