[1] Italian Multiple Sclerosis Fdn, Sci Res Area, Genoa, Italy
[2] Italian Multiple Sclerosis Soc, AISM Rehabil Serv, Aosta, Italy
[3] Italian Multiple Sclerosis Soc, AISM Rehabil Serv, Vicenza, Italy
[4] Italian Multiple Sclerosis Soc, AISM Rehabil Serv, Padua, Italy
[5] Italian Multiple Sclerosis Soc, AISM Rehabil Serv, Como, Italy
[6] Italian Multiple Sclerosis Soc, AISM Rehabil Serv, Genoa, Italy
[7] Univ Siena, Dept Life Sci, Siena, Italy