1. Department of Clinical Neurology, Istituto Nazionale Neurologico C. Besta, Milano
2. Neurology Unit, Ospedale ‘Moscati’, Avellino
3. Neurology Unit, Ospedale ‘San Pietro’, Ponte San Pietro
4. Neurology Unit, Ospedale ‘G. Salvini’ Garbagnate Milanese
5. Data Management Unit, Docleader, Somma Lombardo, Varese, Italy