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Distribution of serum TRAb values in patients with newly diagnosed hyperthyroidism caused by Graves' disease and enrolled in the RISG study. According to inclusion criteria, none had TRAb < 1.0 IU/L. Up to 40 IU/L, intervals are 2.5 IU/L wide. At 40 IU/L and above, intervals are 20 IU/L wide.
