1. Faculty of Medicine, Department of Clinical Sciences Lund University Lund Sweden
2. Department of Neurosurgery Skåne University Hospital Lund Sweden
3. Department of Pain Rehabilitation Skåne University Hospital Lund Sweden
4. Department of Clinical Sciences, Institute for Palliative Care Lund University Lund Sweden
5. Division of Occupational and Environmental Medicine, Department of Laboratory Medicine Lund University Lund Sweden