1 Department of Neurosurgery, Neurological Institute of New York, New York Presbyterian Hospital-Columbia University Irving Medical Center, New York, NY, USA.
2 Stichting Epilepsie Instellingen Nederland (SEIN), P.O. Box 540, 2130 AM Heemstede, Netherlands.
3 UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK.
4 Chalfont Centre for Epilepsy, Chalfont St Peter, London, UK.
5 Department of Neurology, West China Hospital, Sichuan University, Chengdu 610041, China.
6 Department of Neurology, Leiden University Medical Centre, Albinusdreef 2, 2333 ZA Leiden, Netherlands.