1. Faculty of Social and Health Sciences, Inland Norway University of Applied Sciences, Lillehammer, Norway
2. Department of Health, Care and Social Welfare, Mälardalens University, Västerås, Sweden
3. Beitostølen Healthsports Centre, Beitostølen, Norway
4. Department of Neurosciences for Children, Oslo University Hospital, Oslo, Norway
5. Institute of Health and Society, CHARM, University of Oslo, Oslo, Norway