EPO-0627 Clinical relevance of evoked potentials for disease progression in early multiple sclerosis and clinically isolated syndrome in the ProVal-MS study [Abstract] / Marie Braun, J. Havla, M. Kowarik, H. Tumani, Lars Behrens, Markus Naumann, H. Zimmermann, J. Kirschke, M. Senel, M. Kerschensteiner, Lino Braadt, Verena Steuerwald, Korbinian Holzapfel, Anna Muzalyova, H. Spengler, M. Mühlau, E. Oswald, M. Hagedorn, B. Sailer, B. Bender, I. Vardakas, N. Sollmann, O. Kohlbacher, H. Kestler, F. Kohlmayer, U. Ziemann, F. Albashiti, Frank Kramer, M. Boeker, P. Uibel, S. Buchka, Iñaki Soto-Rey, Sven Olaf Rohr, U. Mansmann, B. Hemmer, Antonios Bayas