Erratum to: Neurol Sci DOI 10.1007/s10072-013-1595-2

Unfortunately the following co-author name was incorrectly published as Antonio Elia in the original publication. The name of the author should read as Antonio Emanuele Elia.

Inadvertently, one of the co-author name (Luigi Romito) and affiliation were omitted in the author group of published article. The rearranged author group is given below.

Domenico Aquino, Valeria Contarino, Alberto Albanese, Ludovico Minati, Laura Farina, Marina Grisoli, Luigi Romito, Antonio Emanuele Elia, Maria Grazia Bruzzone, Luisa Chiapparini.

Luigi Romito

1st Neurology Unit,

IRCCS Foundation Neurological Institute Carlo Besta,

Milan, Italy