[1] Univ Parma, Dept Pediat, Neuropsychiat Unit, I-43100 Parma, Italy
[2] Birmingham Childrens Hosp, Dept Clin Neurophysiol, Birmingham, W Midlands, England
[3] Birmingham Childrens Hosp, Comprehens Paediat Epilepsy Programme, Birmingham, W Midlands, England
[4] Univ La Sapienza, Dept Child Neuropsychiat, Rome, Italy