Progression Independent of Relapse Activity in Early RRMS - an Analysis of the German NationMS CohortCatharina Korsukewitz,Luisa Klotz,Bernhard Hemmer,Orhan Aktas,Antonios Bayas,Ralf Gold,Christoph Heesen,Markus Kowarik,Tania Kuempfel,Felix Luessi,Stefan Bittner,Sven Meuth,Sandra Nischwitz,Friedemann Paul,Maria Seipelt,Florian Then Bergh,Corinna Trebst,Hayrettin Tumani,Brigitte Wildemann,Uwe K. Zettl,Salmen Anke, Barabra Gisevius,Gisela Antony,Frauke Zipp,Heinz Wiendl