Kumar, M S Evaluation of T 4 radioimmunoassay as a screening test for thyroid function: comparison with effective thyroxine ratio. [electronic resource] - Cleveland Clinic quarterly 1977 - 1-7 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0009-8787 Standard No.: 10.3949/ccjm.44.1.1 doi Subjects--Topical Terms: AnimalsAntigen-Antibody ReactionsHumansHyperthyroidism--diagnosisHypothyroidism--diagnosisRabbitsRadioimmunoassayThyroid Function Tests--methodsThyroxine--blood