About the Author
Catherine Whitlock is a science writer with a BSc in Biological Sciences and a PhD in Immunology. She writes on science, medicine and nature and is based in Kent, England. She is the co-author of Meet Your Bacteria with Nicola Temple. Nicola Temple worked as a conservation biologist before becoming a full-time writer specializing in science and the environment. She has an MSc in Biological Sciences and lives in Bristol, England. Professor John Wass is the Professor of Endocrinology at Oxford University and was the head of the Department of Endocrinology at the Oxford Centre for Diabetes, Endocrinology and Metabolism, Churchill Hospital Oxford, UK, until 2011. He is currently the Clinical Reference Group Chair for Endocrinology in the UK.