1. Department of Neurology and RehabilitationTampere University Hospital Tampere Finland
2. Faculty of Medicine and Life SciencesUniversity of Tampere Tampere Finland
3. Science CenterTampere University Hospital Tampere Finland
4. Faculty of Social SciencesUniversity of Tampere Tampere Finland
5. Neuromuscular Research Center, University of Tampere andTampere University Hospital Tampere Finland