1. Clinical Neurosciences, Neurology University of Helsinki HelsinkiFinland
2. Department of Neurology Helsinki University Hospital HelsinkiFinland
3. Department of Cardiology, Heart and Lung Center Helsinki University Hospital and University of Helsinki HelsinkiFinland
4. Department of Clinical Physiology and Nuclear Medicine HUS Medical Imaging Center Helsinki University Hospital and University of Helsinki HelsinkiFinland
5. Internal Medicine University of Helsinki Helsinki University Hospital and South Karelia Central Hospital HelsinkiFinland
6. Department of Clinical Neuroscience Institute of Neuroscience and Physiology Sahlgrenska Academy at University of Gothenburg GothenburgSweden
7. Department of Neurology Sahlgrenska University Hospital Gothenburg Sweden