1. Department of Educational Sciences, University of South-Eastern Norway, 3045 Drammen, Norway
2. Research Department, Sunnaas Rehabilitation Hospital, 1450 Nesoddtangen, Norway
3. Department of Sport and Social Sciences, Norwegian University of Sport Sciences, 0806 Oslo, Norway
4. Department of Neurobiology, Care Sciences and Society, Division of Neurogeriatrics, Karolinska Institutet, 141-83 Stockholm, Sweden
5. Department of Educational Sciences, Karlstad University, 651 88 Karlstad, Sweden