1. Copenhagen Center for Arthritis Research (COPECARE), Center for Rheumatology and Spine Diseases, Centre for Head and Orthopaedics, Rigshospitalet, Glostrup, Denmark
2. Herlev Anaesthesia Critical and Emergency Care Science Unit, ACES, Department of Anesthesiology, Copenhagen University Hospital, Herlev-Gentofte, Copenhagen, Denmark
3. Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
4. Preventive Cardio-Rheuma Clinic, Department of Rheumatology, Diakonhjemmet Hospital, Oslo, Norway
5. The Danish Rheumatism Association, Gentofte, Denmark