1. Department of Radiology and Nuclear Medicine, Free University, Berlin, Germany
2. NIHR Musculoskeletal Biomedical Research Unit, Central Manchester University Hospitals NHS Foundation Trust, & Arthritis Research UK Centre for Epidemiology, Manchester, University of Manchester
3. Department of Public Health and Primary Care, Strangeways Research Laboratory, Cambridge, UK
4. Klinik fur Innere Medezin IV, Jena, Germany
5. Rheumatology, Hospital de San Joao, Oporto, Portugal
6. Rheumatology, Royal National Hospital for Rheumatic Diseases, Bath, UK
7. Nephrology, Asturias General Hospital, Oviedo, Spain
8. Rheumatology, University Hospital, Leuven, Belgium
9. Mellanby Centre for Bone Research, University of Sheffield, Sheffield, UK
10. Medicine, PKP Hospital, Warsaw, Poland
11. Laboratory for the Research of Musculoskeletal System, University of Athens, Athens, Greece
12. Rheumatology, Institute of Rheumatic Diseases, Piestany, Slovakia
13. Department of Epidemiology and Department of Internal Medicine, Erasmus University, Rotterdam, Netherlands
14. Department of Hypertension and Internal Medicine, Pomeranian Medical University, Szczecin, Poland
15. Institute of Clinical Medicine, University of Siena, Siena, Italy
16. 1st Department of Rheumatology and Metabolic Osteology, National Institute of Rheumatology and Physiotherapy, Budapest, Hungary
17. Orthopaedics and Radiology, Malmö General Hospital, Malmö, Sweden
18. School of Medicine, Medical Science and Nutrition, University of Aberdeen, Aberdeen, UK
19. Rheumatology, Med Klinik & Polyklinik, Bochum, Germany
20. School of Health Sciences, The University of Manchester, Oxford Road, Manchester
21. Institute of Health Care Research, Peninsula College of Medicine and Dentistry, Universities of Exeter and Plymouth, Royal Cornwall Hospital, Truro
22. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, NIHR Musculo-skeletal Biomedical Research Unit, Botnar Research Centre, Oxford, UK