[1] Second Department of Neurology,
[2] Institute of Neuropsychiatry,undefined
[3] University of Palermo,undefined
[4] Via La Loggia 1,undefined
[5] 90129 Palermo,undefined
[6] Italy,undefined
[7] Tel.: +39-91-6 55 51 12/20,undefined
[8] Fax: +39-91-6 55 51 13,undefined
[9] e-mail: rcamarda@neuro.unipa.it,undefined