1. Department of Clinical Neuroscience, Karolinska Institutet , Stockholm, Sweden
2. Department of Neurology, Danderyd Hospital , Stockholm, Sweden
3. Department of Internal Medicine and Cardiology, Oslo University Hospital , Oslo, Norway
4. Institute of Clinical Medicine, University of Tromsø , Tromsø, Norway
5. Department of Clinical Sciences, Karolinska Institutet, Danderyd Hospital , Stockholm, Sweden
6. Center for Safety Research, KTH Royal Institute of Technology , Stockholm, Sweden
7. Clin Neuroscience, Institute of Neuroscience and Physiology, the Sahlgrenska Academy, Univ of Gothenburg , Göteborg, Sweden
8. Department of Neuroscience, Neurology, Uppsala University , Uppsala, Sweden