- Correspondence to Professor M J Johnson, Hull York Medical School, University of Hull, Hertford Building, Hull HU6 7RX, UK;
- Received November 22, 2016
- Revised January 7, 2017
- Accepted January 18, 2017
- First published February 20, 2017.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.