Double-Blind Controlled Randomized Trial of Cyclophosphamide versus Methylprednisolone in Secondary Progressive Multiple Sclerosis. - Brochet B; Deloire MS; Perez P; Loock T; Baschet L; Debouverie M; Pittion S; Ouallet JC; Clavelou P; de Sèze J; Collongues N; Vermersch P; et al. (PloS one, 2017)