**Author details**

Julian P. Legg1,2,3

1 Department of Paediatric Respiratory Medicine, Southampton Children's Hospital, Southampton, UK

2 Southampton NIHR Respiratory Biomedical Research Unit, Southampton General Hospital, Southampton, UK

3 Clinical and Experimental Sciences, University of Southampton Faculty of Medicine, Southampton General Hospital, Southampton, UK

\*Address all correspondence to: jpl2@soton.ac.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.
