- Correspondence to Dr David M Smith, Calderdale and Huddersfield NHS Foundation Trust, Huddersfield HD3 3EA,UK;
- Received 6 July 2017
- Accepted 7 July 2017
- Published online 29 July 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.