- Correspondence to Dr Dimitri Psimaras, Service de Neurologie 2-Mazarin, AP-HP Groupe Hospitalier Pitié-Salpêtrière, 47-83 Boulevard de l’Hôpital, Paris 75013, France;
- Received 19 July 2017
- Revised 20 September 2017
- Accepted 2 October 2017
- Published online 10 February 2018.
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