[1] Fdn IRCCS Neurol Inst C Besta, Unit Neuroepidemiol, Milan, Italy
[2] Univ Lubeck, Inst Social Med & Epidemiol, Lubeck, Germany
[3] Fdn IRCCS Neurol Inst C Besta, Dept Neuroimmunol & Neuromuscular Dis, Milan, Italy
[4] G Dannunzio Univ Chieti Pescara, Dept Neurosci Imaging & Clin Sci, Chieti, Italy
[5] Univ Bari, Dept Basic Med Sci, Bari, Italy
[6] Univ Bari, Dept Neurosci, Bari, Italy
[7] Univ Bari, Dept Sense Organs, Bari, Italy
[8] Fdn IRCCS Ist Nazl Cura Tumori, Unit Clin Psychol, Milan, Italy
[9] Italian Multiple Sclerosis Assoc, Dept Hlth Serv & Res, Genoa, Italy
[10] Tor Vergata Univ Rome, Fac Econ, CEIS, Rome, Italy