In the early 20th century, iodine deficiency was ravaging much of the northern United States. The region was widely known as the "goiter belt," for the goiters heavily swollen thyroid glands that bulged from many residents necks.
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In the early 20th century, iodine deficiency was ravaging much of the northern United States. The region was widely known as the “goiter belt,” for the goiters - heavily swollen