1. Faculty of Medicine, University of Helsinki, Helsinki, Finland
2. BioMag Laboratory, Helsinki University Hospital, Helsinki, Finland
3. Validia Ltd., Helsinki, Finland
4. Department of Physical and Rehabilitation Medicine, Helsinki University Hospital, Helsinki, Finland
5. Department of Surgery, University of Helsinki, Helsinki, Finland
6. Clinical Neurosciences, Neurology, Helsinki University Hospital, Helsinki, Finland
7. The Finnish Association of People with Physical Disabilities, Helsinki, Finland