1. Neurology, HUS Neurocenter University of Helsinki and Helsinki University Hospital Helsinki Finland
2. Radiology, HUS Medical Imaging Center University of Helsinki and Helsinki University Hospital Helsinki Finland
3. Department of Neurology, Christchurch Hospital New Zealand Brain Research Institute Christchurch New Zealand
4. Department of Clinical Neurosciences/Neurology, Institute of Neurosciences and Physiology Sahlgrenska Academy at University of Gothenburg Gothenburg Sweden
5. Department of Neurology Sahlgrenska University Hospital Gothenburg Sweden