1. Department of Interdisciplinary Health Sciences, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
2. Norwegian National Advisory Unit on CFS/ME, Division of Pediatrics and Adolescents, Rikshospitalet, Oslo University Hospital, Oslo, Norway
3. Research Group MOVANT, Department of Rehabilitation Sciences and Physiotherapy, University of Antwerp, Wilrijk, Belgium
4. Department of Rehabilitation Sciences and Physiotherapy, Ghent University, Ghent, Belgium
5. Pain in Motion, International Research Group
6. CFS/ME Unit, Vall d’Hebron University Hospital Research Institute, Universitat Autònoma De Barcelona, Barcelona, Spain
7. Society and Health, Buckinghamshire New University, High Wycombe, UK
8. Faculty of Health Studies, VID Specialized University, Oslo, Norway