1. CEMEREM, APHM La Timone Marseille France
2. Aix Marseille Univ, CNRS, CRMBM, Marseille, France Marseille France
3. Department of Neuroradiology APHM La Timone Marseille France
4. Institute of Neuroimmunology and Multiple Sclerosis University Medical Centre Hamburg‐Eppendorf Germany
5. Department of Neurology University Medical Centre Hamburg‐Eppendorf Hamburg Germany
6. Department of Diagnostic and Interventional Neuroradiology University Medical Centre Hamburg‐Eppendorf Hamburg Germany