1. Department of Radiology, MR Center for MS Research, VU University Medical Center, Amsterdam, The Netherlands,
2. Department of Physics and Medical Technology, MR Center for MS Research, VU University Medical Center, Amsterdam, The Netherlands
3. MR Research Unit and Department of Neurology, Medical University Graz, Graz, Austria
4. Department of Clinical Epidemiology and Biostatistics, MR Center for MS Research, VU University Medical Center, Amsterdam, The Netherlands
5. Department of Radiology, MR Center for MS Research, VU University Medical Center, Amsterdam, The Netherlands
6. Department of Neurology, MR Center for MS Research, VU University Medical Center, Amsterdam, The Netherlands