1. Department of Odontology, Clinical Oral Physiology, Faculty of Medicine Umeå University Umeå Sweden
2. Department of Orofacial Pain and Jaw Function, Faculty of Odontology Malmö University Malmö Sweden
3. Department of Community Medicine and Rehabilitation, Rehabilitation Medicine Umeå University Umeå Sweden
4. Department of Clinical Science, Neurosciences, Div Clinical Neurophysiology Umeå University Umeå Sweden
5. Department of Occupational Health Science and Psychology, Faculty of Health and Occupational Studies University of Gävle Gävle Sweden