Evaluation of No Evidence of Progression or Active Disease (NEPAD) in Patients with Primary Progressive Multiple Sclerosis in the ORATORIO Trial

Xavier Montalban, Jerry Wolinsky, Ludwig Kappos, Stephen L. Hauser, Gavin Giovannoni, Jerome de Seze, Amit Bar-Or, Donna Masterman, Corrado Bernasconi, Wei Wei, Hideki Garren, P Chin, S Belachew, DL Arnold