1. Danish Research Centre for Magnetic Resonance, Copenhagen University Hospital—Amager and Hvidovre , 2650 Hvidovre , Denmark
2. Department of Health Technology, Technical University of Denmark , 2800 Kgs Lyngby , Denmark
3. Danish Multiple Sclerosis Center, Department of Neurology, Copenhagen University Hospital—Rigshospitalet , 2600 Glostrup , Denmark
4. Department of Clinical Medicine, University of Copenhagen , 2200 Copenhagen , Denmark
5. Department of Neurology, Copenhagen University Hospital—Bispebjerg and Frederiksberg , 2400 Copenhagen , Denmark