1. Norwegian National Advisory Unit on Vestibular Disorders, Department of Otorhinolaryngology/Head and Neck Surgery; Haukeland University Hospital; Bergen Norway
2. Department of Clinical Medicine; University of Bergen; Bergen Norway
3. Department of Global Public Health and Primary Care; University of Bergen; Bergen Norway
4. The Outpatient Spine Clinic, Department of Physiotherapy; Haukeland University Hospital; Bergen Norway
5. The Outpatient Spine Clinic, Department of Physical Medicine and Rehabilitation; Haukeland University Hospital; Bergen Norway