Biblio
. The natural history of multiple sclerosis, a geographically based study 10: relapses and long-term disability. Brain [Internet]. 2010;133:1914-1929. Available from: http://www.hubmed.org/display.cgi?uids=20534650
. The natural history of multiple sclerosis: a geographically based study: 8: familial multiple sclerosis. Brain [Internet]. 2000;123 Pt 3:641-649. Available from: http://www.hubmed.org/display.cgi?uids=10686184

]