Affiliation: | 1.MS Center, Department of Neurology,VU Medical Center,Amsterdam,The Netherlands;2.Bayer Schering AG,Berlin,Germany;3.Department of Radiology,VU medical Center,Amsterdam,The Netherlands;4.Department of Neurology,The Ottawa Hospital,Ontario,Canada;5.Department of Neurology,Hopital Pontchaillou,Rennes,France;6.Department of Radiology,Queen square hospital,London,UK;7.Department of Neurology,Kantonsspital,Switzerland;8.Department of Epidemiology and Biostatistics,VU Medical Center,Amsterdam,The Netherlands |