Continuation of Misrepresentations of Analogue Free Hormone Assays

Ekins R. Hirsutism: Free and bound testosterone. Ann Clin Biochem 1990; 27, 91–3.

Ekins R. Validity of analog free thyroxin immunoassays. Part I [Opinion]. Clin Chem 1987; 33: 2137–52.

Midgley JEM Moon CR Wilkins TA . Validity of analog free thyroxin immunoassays. Part II [Opinion]. Clin Chem 1987; 33: 2145–8.

Midgley JEM Wilkins TA . Effect of albumin concentration on equilibrium radioimmunoassay of serum free thyroxin with labelled thyroxin alalog (Amerlex free T4). [Letter]. Clin Chem 1983; 29: 1861–3.

Jowett T Chu T Ekins R. Validity of current analog-based free hormone immunoassays. Steroids 1988; 52: 365–6.

Blight LF Judd SJ White GH . Relative diagnostic value of serum non-SHBG-bound testosterone, free androgen index and free testosterone in the assessment of mild to moderate hirsuitism. Ann Clin Biochem 1989; 26: 311–16.

Tait JF Burstein S. In vivo studies of steroid dynamics in man. In: Pincus V Thimann KV Astwood EB , eds. The Hormones. vol. V. New York: Academic Press, 1964; 441–557.

Giles AF . An improved method for the measurement of free thyroxine in serum dialysates. Clin Endocrinol 1982; 16: 101–5.

Ball R Freedman DB Holmes JC Midgley JEM Sheehan CP . Low-normal concentrations of free thyroxin in serum in late pregnancy: Physiological fact, not technical artefact. Clin Chemo 1989; 35: 1891–6.

Midgley JEM Sheehan CP Christofides ND Fry JE Browning D Mardell R. Concentrations of free thyroxin and albumin in serum in severe non-thyroidal illness: Assay artefacts and physiological influences. Clin Chem 1990 (in press).

Wilkins TA Midgley JEM Barron N. Comprehensive study of a thyroxin-analog-based assay for free thyroxin (‘Amerlex FT4’) Clin Chem 1985; 31: 1644–53.

Midgley JEM Winton MRJ Wilkins TA . Relationship between effects of added albumin, initial free thyroxine value and endogenous serum-binding protein concentrations on Amerlex™ free thyroxine estimations. Clin Chim Acta 1987; 167: 67–79.

Ekins RP Jackson T Edwards P Geiseler D. Interpretation of labelled-analog free hormone assay. Clin Chem 1984; 30: 491–3.

Ekins RP . Free hormones in blood: The concept and the measurement. J Clin Immunoassay 1984; 7: 163–80.