[1] Ist Nazl Neurol Carlo Besta, Neuroepidemiol Unit, I-20133 Milan, Italy
[2] Dept Org & Dev, Genoa, Italy
[3] Hosp Macerata, Dept Neurol, Macerata, Italy
[4] Ist Sci San Raffaele, Dept Neurosci, I-20132 Milan, Italy
[5] Univ Osped San Raffaele, Milan, Italy
[6] Univ Cagliari, Dept Neurosci, Cagliari, Italy
[7] Univ Bari, Dept Neurol, Bari, Italy
[8] Univ Bari, Dept Psychiat Sci, Bari, Italy
[9] Ist Nazl Cura Tumori, Unit Psychol, Milan, Italy
[10] Italian Multiple Sclerosis Soc, Dept Social & Hlth Res, Genoa, Italy