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Credit
Recent observations on the functions of the thyroid gland, and the relation of its enlargment to Graves's disease : also remarks on the therapeutic use of sheep's thyroids and of other organic extracts / by James J. Putnam. Public Domain Mark. Source: Wellcome Collection.
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This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.