[1] Chalfont Ctr Epilepsy, Gerrards Cross, Bucks, England
[2] UCL, Dept Clin & Expt Epilepsy, Queen Sq Inst Neurol, London WC1N 3BG, England
[3] Ludwig Maximilians Univ Munchen, Epilepsy Ctr, Dept Neurol, Munich, Germany
[4] Univ Nottingham, Med Sch, Nottingham, England
[5] Univ Florence, Childrens Hosp A Meyer IRCSS, Neurosci Dept, Florence, Italy
[6] Sichuan Univ, West China Hosp, Dept Neurol, Chengdu, Peoples R China
[7] Stichting Epilepsie Instellingen Nederland SEIN, Heemstede, Netherlands