1. Department of PhysiotherapyNordland Hospital Trust Bodø Norway
2. Department of Community Medicine, Faculty of Health SciencesUiT, The Arctic University of Norway Tromsø Norway
3. Institute for Clinical Medicine, Faculty of Health ScienceUiT, The Arctic University of Norway Tromsø Norway
4. Department of NeurologyNordland Hospital Trust Bodø Norway
5. BIOMED/REVALUniversity of Hasselt Diepenbeek Belgium
6. Department of Health and Care SciencesUiT, The Arctic University of Norway Tromsø Norway