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A nationwide survey of the incidence of clinical thyrotoxicosis in Iceland was made during the three-year period 1980-1982. An annual incidence of 23.6 per 100 000 inhabitants was found, females outnumbering males by 4.2:1; 72% of all patients were aged 20-49. Graves' disease was considered the cause in 83.3% of the patients.
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Haraldsson et al. (1985) studied this question.
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