[1] Univ Milan, IRCCS, Osped Maggiore Policlin, Inst Clin Neurol,Ctr Dino Ferrari, I-20122 Milan, Italy
[2] Red Cross Hosp, Div Neurol, Athens, Greece
[3] Duke Univ, Med Ctr, Dept Pediat, Div Med Genet, Durham, NC 27710 USA
[4] Univ Messina, Inst Clin Neurol 2, Messina, Italy
[5] Osped Infermi, Serv Neurol, Rimini, Italy