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British Thyroid Foundation (BTF) (2016) Your Thyroid Gland [Online]. Available at http://btf-thyroid.org/information/your-thyroid-gland (Accessed 19 April 2018).
Gottfried, S. (1994) Human Biology, St Louis and London, Mosby.
Tortora, G. J. and Grabowski, S. R. (1993) Principles of Anatomy and Physiology, 7th edn, New York, HarperCollins.
Villee, C. A. (1989) Biology, 2nd edn, Philadelphia, Saunders College Publishing.