1. Measurement of total testosterone in women: comparison of a direct radioimmunoassay versus radioimmunoassay after organic solvent extraction and celite column partition chromatography 
Sonia L. Davison, M.D., Robin Bell, M.D., Ph.D., Joe G. Montalto, Ph.D., Ken Sikaris, M.D., Susan Donath, M.A., Frank Z. Stanczyk, Ph.D., Susan R. Davis, M.D., Ph.D. 
Fertility and Sterility 
Volume 84, Issue 6, Pages (December 2005)
DOI: /j.fertnstert
Copyright © 2005 American Society for Reproductive Medicine Terms and Conditions

2. FIGURE 1
Values for total testosterone (T) direct radioimmunoassay (RIA) vs. conventional RIA.
Davison. Total testosterone in women. Fertil Steril 2005.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2005 American Society for Reproductive Medicine Terms and Conditions

3. FIGURE 2
The difference between the measurements of direct radioimmunoassay (RIA) and conventional RIA vs. the mean of the two measurements.
Davison. Total testosterone in women. Fertil Steril 2005.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2005 American Society for Reproductive Medicine Terms and Conditions