Institution: | 1. Department of Neurology, CUB Hopital Erasme, Université Libre de Bruxelles, Brussels, Belgium;2. Department of Neurology, CHU Ignace Deen, Université Gamal Abdel Nasser Conakry, Conakry, Guinea;3. Centre de Diagnostic Caisse Nationale de Sécurité Sociale, Conakry, Guinea |