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Distributions of TSH by ELISA for the HTDS total population (n = 1861) and NRGs (NRG-1: n = 1448; NRG-2: n = 1186; NRG-3: n = 766), and of TSH by ICMA for NRG-3. In these boxplots, the whiskers and box ends represent the 2.5th and 97.5th percentiles, and the 25th and 75th percentiles of the distributions, respectively, and the middle lines represent the medians.
