RT Journal Article SR Electronic T1 Simultaneous Measurement of Percentage Free Thyroxine and Triiodothyronine: Comparison of Equilibrium Dialysis and Sephadex Chromatography JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 660 OP 664 VO 17 IS 7 A1 Steven M. Snyder A1 Ralph R. Cavalieri A1 Sidney H. Ingbar YR 1976 UL http://jnm.snmjournals.org/content/17/7/660.abstract AB