1. Institute of Clinical Medicine, School of Medicine, Faculty of Health Sciences; University of Eastern Finland; Kuopio Finland
2. Department of Clinical Neurophysiology; Kuopio University Hospital; Kuopio Finland
3. Department of Clinical Radiology; Kuopio University Hospital; Kuopio Finland
4. Department of Applied Physics; University of Eastern Finland; Kuopio Finland
5. Department of Neurology; Kuopio University Hospital; Kuopio Finland