1. Clinic for Physical Medicine and Rehabilitation, Vestfold Hospital Trust, Stavern, Norway
2. Oslo and Akershus University College of Applied Sciences, Oslo, Norway
3. Beitostølen Healthsports Center, Beitostølen, Norway
4. Department for Practical, Physical and Aesthetic Education, Faculty of Education and Humanities, Buskerud and Vestfold University College, Tønsberg, Norway
5. Department of Neurosciences for Children, Oslo University Hospital, Oslo, Norway