- Correspondence to Dr Karine Viala, Département de Neurophysiologie Clinique, Hôpital de la Salpêtrière, 47 bd de l'Hôpital, 75651 Paris, cedex 13, France;
- Received July 3, 2013
- Revised November 14, 2013
- Accepted November 17, 2013
- First published December 5, 2013.
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