The Lord made me a physician and I specialized in endocrinology, the treatment of hormonal diseases. Just as I was preparing to retire from practice, two of my colleagues, Drs. Mark Sheehan and Dan Smith, invited me to join their Tuesday morning Bible study. That began a fellowship that changed my life.
They had been to Cambodia and stressed to me something curious they had found in their patients, a high frequency of goiters. That in itself was enough to tweak my interest. Enlargement of the thyroid gland had been a challenge in my practice in North America. I was hooked on seeing how it might differ in another population.
A quick study of the endocrinology literature told me that they were seeing iodine deficiency goiters. Iodine is a key component in the chemical structure of thyroid hormone. If there is not enough of it in the diet, the thyroid gland must work harder. In doing so, it gets bigger. My entire career up to that point had been in Canada and the United States. The soil in many parts of both countries is deficient in iodine. However, iodized salt has been used for generations to correct the deficiency in the diet. FULL POST 

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