110 LARSENetal. 90r ? 40Fr a 3 30 F & . XY x x < 20Ff a 1OF FIG.1. Basal piasma TSH and TRH-stimulated TSH in euthyroid Marshallese and in four exposed subjects with biochemical evidence of impaired thyroid function. Plasma was obtained 20 min after infusion of 500 ug TRH. The upper limits of the normal range are indicated by the shadedbars. wee. 0 BASAL AFTER TRH TABLE Vil. CHARACTERISTICS OF MARSHALLESE WITH BIOCHEMICAL _EVIDENCE OF THYROID DYSFUNCTION Subject ase ire pe Estimated thyroid dose (rads) Normal values 14 7 78 4 16 28 37 38 2 Not tested. ay i ‘ ‘ 5 fa 2 oy my OS Seg Be i é tae & er 8 335-810 335 335 335 Ts Increment STUTs ee §-10.2 0.85-—1.10 1.6-6.8 5.3 5.2 6.1 7.4 0.97 0.98 0.82 0.79 0.8 N.T.? 0.8 0.9 (ug/dl) 24h p TSH (ug/dl)