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Multiple Sclerosis International
Volume 2013, Article ID 189624, 9 pages
http://dx.doi.org/10.1155/2013/189624
Clinical Study

Assessment of Definitions of Sustained Disease Progression in Relapsing-Remitting Multiple Sclerosis

1Partners MS Center, Harvard Medical School, Brigham and Women's Hospital, 1 Brookline Place, Brookline, MA 02445, USA
2Biostatistics Center, Massachusetts General Hospital, Boston, MA 02114, USA
3Department of Statistics, Brigham Young University, Provo, UT 84602, USA

Received 5 November 2012; Accepted 23 January 2013

Academic Editor: Ellen M. Mowry

Copyright © 2013 Brian C. Healy et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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