- Correspondence to Dr Mark A Ellul, Department of Neurology, The Walton Centre NHS Foundation Trust, Lower Lane, Liverpool L9 7LJ, UK;
- Accepted September 12, 2016
- First published November 2, 2016.
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.