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This is essentially a preliminary report of a study covering ten counties in England and three in Scotland. In ascertaining the distribution of iodine, analyses were made of soils from representative farms, pastures from the same fields, milk from cows grazing the pastures sampled, eggs, potatoes, cabbages, blood from sheep slaughtered in the same district, and thyroids from the same sheep. In the report are given the results of analyses of 458 substances, including 373 food samples. The results of the study do not support the view that a deficiency of iodine in the food is definitely correlated with the occurrence of endemic goiter.
Iodine Supply and the Incidence of Endemic Goiter. JAMA. 1931;96(24):2059. doi:10.1001/jama.1931.02720500053042
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