RT Journal Article SR Electronic T1 Clinical Evaluation of a Thyroxine Binding Globulin Assay in Calculating a Free Thyroxine Index in Normal, Thyroid Disease, and Sick Euthyroid Patients JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1341 OP 1343 VO 28 IS 8 A1 Walter E. Szpunar A1 Sheldon S. Staffer A1 Walter DiGiulio YR 1987 UL http://jnm.snmjournals.org/content/28/8/1341.abstract AB