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The most common laboratory alterations of thyroid function indicating hyperthyroidism were evaluated in a series of 3015 subjects over 65 years of age by determining total T3, total T4 and TSH. Ultrasound and scintigraphy of the thyroid were performed where necessary. Our results showed a high prevalence of laboratory alterations hyperthyroidism type of around 8.09%, whereas the real prevalence...
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