[1] UCL Inst Neurol, Dept Clin & Expt Epilepsy, London WC1N 3BG, England
[2] Amedeo Avogadro Univ, Dept Clin & Expt Med, Neurol Sect, Novara, Italy
[3] Charite, Seizure Clin, Dept Neurol, D-13353 Berlin, Germany
[4] SEIN Epilepsy Inst Netherlands Fdn, Heemstede, Netherlands