1. Youth Clinic Hisingen, City of Gothenburg, Gothenburg, Sweden;
2. The Sahlgrenska Academy at University of Gothenburg, Institute of Health and Care Sciences, Gothenburg, Sweden;
3. Närhälsan Research and Development Primary Health Care, Region Västra Götaland, Gothenburg, Sweden;
4. Department of Health and Rehabilitation, Unit of Physiotherapy, The Sahlgrenska Academy at University of Gothenburg, Institute of Neuroscience and Physiology, Gothenburg, Sweden