1. Department of Neurology, Donders Institute for Brain Cognition and Behavior, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands
2. Department of Neurology, Leiden University Medical Centre, 2300 RC Leiden, The Netherlands
3. Stichting Epilepsie Instellingen Nederland, 2130 AM Hoofddorp, The Netherlands
4. UCL Queen Square Institute of Neurology, University College London, London WC1N 1PJ, UK