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Nygaard, Gro O., Elisabeth G. Celius, Sigrid A. de Rodez Benavent, Piotr Sowa, Marte W. Gustavsen, Anders M. Fjell, Nils I. Landrø, Kristine B. Walhovd, and Hanne F. Harbo. "A Longitudinal Study of Disability, Cognition and Gray Matter Atrophy in Early Multiple Sclerosis Patients According to Evidence of Disease Activity." PLoS One 2015.

Nygaard, Gro O., et al. "A Longitudinal Study of Disability, Cognition and Gray Matter Atrophy in Early Multiple Sclerosis Patients According to Evidence of Disease Activity." PLoS One 2015.