**Author details**

David Kieser1 \*, Scheherezade Soltani2 , Michael Wyatt1 , Khoon Lim1 and Sandra Kieser1

1 School of Medicine, Department of Orthopaedics and Musculoskeletal Medicine, University of Otago, Christchurch, Christchurch, New Zealand

2 Division of Spinal Surgery, Oxford University NHS Foundation Trust, Oxford, England

\*Address all correspondence to: kieserdavid@gmail.com

© 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.
