1. Department of Psychology, University of Kentucky, Lexington, Kentucky, USA
2. Department of Physical Medicine and Rehabilitation, Harvard Medical School; Spaulding Rehabilitation Hospital and Spaulding Research Institute; and Home Base, a Red Sox Foundation and Massachusetts General Hospital Program, Boston, Massachusetts, USA
3. Helsinki University Central Hospital, Neurocenter, Department of Neurology, Helsinki, Finland
4. Medical Imaging Centre, Department of Radiology, Tampere University Hospital, Tampere, Finland
5. Department of Neurosurgery, Tampere University, Tampere, Finland
6. Department of Neurosurgery, Tampere University Hospital and Tampere University, Tampere, Finland