**Author details**

Ejaz Ansari1,2

1 Eye Ear and Mouth Unit, Maidstone and Tunbridge Wells NHS Trust, Kent, UK

2 Institute of Medical Sciences, Canterbury Christ Church University, Kent, UK

\*Address all correspondence to: e.ansari@nhs.net

© 2022 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
