Guillaume Taieb1, Pierre Labauge2. 1. Department of Neurology, CHU Montpellier, Hopital Guy de Chauliac, 80 avenue Augustin Fliche, 34295 Montpellier Cedex 5, France. Electronic address: taiebguillaume@gmail.com. 2. Department of Neurology, CHU Montpellier, Hopital Guy de Chauliac, 80 avenue Augustin Fliche, 34295 Montpellier Cedex 5, France.