1. Neurocenter, Luzerner Kantonsspital, Spitalstrasse 31Luzern 166000 Switzerland
2. University Hospital of Psychiatry, Bolligenstrasse 111Bern 603000 Switzerland
3. Gerontechnology and Rehabilitation Group, University of Bern, Murtenstrasse 50Bern3008 Switzerland
4. Department of Clinical ResearchUniversity of BernBern3000 Switzerland