Vellinga M M, Castelijns J A, Barkhof F, Uitdehaag B M J, Polman C H
Department of Neurology, VU University Medical Center, de Boelelaan 1117, 1081 HV Amsterdam, the Netherlands.
Neurology. 2008 Mar 25;70(13 Pt 2):1150-1. doi: 10.1212/01.wnl.0000265393.03231.e5. Epub 2007 Sep 13.