1. Gian Camillo Manzoni and Mario Giovanni Terzano, Department of Neurology, University of Parma, Parma, Italy; Giorgio Bono, Giuseppe Micieli and Giuseppe Nappi, Department of Neurology, University of Pavia, Pavia, Italy; Nicola Martucci, Department of Neurology, University of L'Aquila, L'Aquila, Italy