Endocrine Surgeon: Parathyroid
- Includes a history, symptoms, diagnosis, and related topics done in a easy to read format.
- http://www.endocrinesurgeon.co.uk/parathyroids/parathyroid1.html

Parathyroid.com
- Discusses diseases, symptoms, tests, and treatments, including mini-surgery.
- http://www.parathyroid.com/

BBC News Health - Human Gland evolved from Gills
- The human parathyroid gland, which regulates calcium levels, probably evolved from fish gills, say researchers.
- http://news.bbc.co.uk/2/hi/health/4067039.stm