1. Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
2. Department of Neurology, Medical University of Warsaw, Warsaw, Poland
3. Department of Clinical Science, Neurosciences, Umeå University, Umea, Sweden
4. Department of Neurology, Jena University Hospital, Jena, Germany
5. Department of Neurology, Hannover Medical School, Hannover, Germany
6. Department of Neurology and Clinical Neurophysiology, Akdeniz University, Faculty of Medicine, Antalya, Turkey
7. Departments of Neurology and Neuroscience, Barts and the London School of Medicine, Queen Mary University of London, United Kingdom, and
8. Department of Neurosciences and Mental Health, Centro Hospitalar Universitário de Lisboa-Norte, Lisbon, Portugal