1. Department of Occupational and Physical Therapy, University Hospital Herlev and Gentofte, Hellerup, Denmark
2. Department of ORL, H&N Surgery and Audiology, University Hospital Rigshospitalet, Copenhagen, Denmark
3. Department of Sports Science and Clinical Biomechanics, Research Unit for Musculoskeletal Function and Physiotherapy, University of Southern Denmark, Odense M, Denmark
4. Child Centre Copenhagen, The Child and Youth Administration, Copenhagen Ø, Denmark