Cerebral atrophy as outcome measure in short-term phase 2 clinical trials in multiple sclerosis

van den Elskamp, Ij; Boden, B; Dattola, V; Knol, Dl; Filippi, Massimo; Kappos, L; Fazekas, F; Wagner, K; Pohl, C; Sandbrink, R; Polman, Ch; Uitdehaag, Bmj; Barkhof, F.