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Abstract
Madam:— Hypothyroidism (simple goitre) can be caused by an inadequate intake of iodine or by the presence in the diet of goitrogens which interfere with the utilization of iodine by the thyroid gland. Outbreaks of goitre occur more commonly in the South Island than in the North, usually as a result of wintering pregnant ewes on brassica crops. Citation (1)