RT Journal Article SR Electronic T1 Disparate Effects of Heparin on Free Thyroxine as Measured by Two Radioimmunoassays: Concise Communication JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 507 OP 510 VO 23 IS 6 A1 I. Ross McDougall A1 Monika F. Bayer A1 David Nierenberg A1 Sandra J. Lewis YR 1982 UL http://jnm.snmjournals.org/content/23/6/507.abstract AB