1. Department of Pain Rehabilitation, Skåne University Hospital, Lund, Sweden;
2. Department of Health Sciences, Lund University, Lund, Sweden;
3. Department of Psychiatry, Oregon Health & Science University School of Medicine, Portland, OR, USA;
4. School for Public Health and Primary Care CAPHRI, Maastricht University Medical Center, Maastricht, The Netherlands;
5. Chalmers Industrial Technology (CIT), Gothenburg, Sweden;
6. Division of Occupational and Environmental Medicine, Department of Laboratory Medicine Lund, Lund University, Lund, Sweden;
7. Department of Otorhinolaryngology, Clinical Sciences, Lund University, Lund, Sweden