Vennegoor A, Wattjes M P, van Munster E T L, Kriekaart R L, van Oosten B W, Barkhof F, Killestein J, Polman C H
VU University Medical Center, Department of Neurology, PO Box 7057, 1007 MB Amsterdam, the Netherlands.
Neurology. 2011 Feb 8;76(6):574-6. doi: 10.1212/WNL.0b013e31820b7644.