1. Department of Neurology/Neuroimmunology, Multiple Sclerosis Centre of Catalonia (Cemcat), Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain
2. Department of Neurology, Hospital San Pedro de Logroño, La Rioja, Spain
3. Section of Neuroradiology, Department of Radiology (IDI), Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain
4. Department of Cardiology, Hospital San Pedro de Logroño, La Rioja, Spain