- Correspondence to Dr Graham Andrew Mackay, Department of Neurology, Queen Elizabeth University hospital, 1345 Govan road, Glasgow G51 4TF, UK;
- Accepted 7 December 2016
- Published in print 23 January 2017.
- Published online 24 January 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.