- Correspondence to Dr Pierre-François Pradat, Département de Neurologie, APHP, Hôpital Pitié-Salpêtrière, Paris 75013, France;
- Received September 7, 2017
- Revised December 5, 2017
- Accepted December 16, 2017
- First published January 20, 2018.
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.