1. The DANBIO Registry and Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Centre of Head and Orthopaedics, Rigshospitalet, Glostrup, Denmark
2. The University Hospitals Centre for Health Research (UCSF), Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
3. Department of Public Health, Section of Social Medicine, Copenhagen, Denmark
4. Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
5. ZiteLab ApS, Copenhagen, Denmark