**Author details**

Ricky Harminder Bhogal\*, Stephanos Pericleous and Aamir Z. Khan The Royal Marsden Hospital, London, United Kingdom

\*Address all correspondence to: ricky.bhogal@rmh.nhs.uk

© 2019 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.
