Anti inflammatory disease modifying treatment does not attenuate disability progression in secondary progressive multiple sclerosisAuthor s J Lorscheider V Jokubaitis T Spelman G Izquierdo A Lugaresi E Havrdova D Horakova M Trojano P Duquette M Girard A Prat F Grand Maison R Hupperts P Grammond E Pucci C Boz P Sola D Spitaleri J Lechner Scott M Terzi V Van Pesch G Iuliano R Bergamaschi R Fernández Bolaños C Ramo Tello F Granella M E Rio C Oreja Guevara H Butzkueven T Kalincik MSBase Study Group