Double-Blind Controlled Randomized Trial of Cyclophosphamide versus Methylprednisolone in Secondary Progressive Multiple Sclerosis. oleh Bruno Brochet, Mathilde S A Deloire, Paul Perez, Timothé Loock, Louise Baschet, Marc Debouverie, Sophie Pittion, Jean-Christophe Ouallet, Pierre Clavelou, Jérôme de Sèze, Nicolas Collongues, Patrick Vermersch, Hélène Zéphir, Giovanni Castelnovo, Pierre Labauge, Christine Lebrun, Mikael Cohen, Aurélie Ruet, PROMESS study investigators