1. NOVA Medical School, Universidade Nova de Lisboa, Lisboa, Portugal
2. Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
3. Department of Rheumatology, Zuyderland Medical Center, Heerlen, The Netherlands
4. Rheumatology and Osteoporosis Unit, Hospital Ortopédico de Sant’Ana, Cascais, Portugal
5. Centre for Rheumatology and MRC Centre for Neuromuscular Diseases, University College London, UK
6. Rheumatology Department, Northwick Park Hospital, London North West University Healthcare NHS Trust, London, UK
7. EpiDoC Unit, CEDOC, NOVA Medical School, Universidade Nova de Lisboa
8. Faculdade de Medicina da Universidade de Lisboa, Lisboa, Portugal
9. Sociedade Portuguesa de Reumatologia, Hospital Egas Moniz, Lisboa, Portugal
10. National School of Public Health, Hospital Egas Moniz, Lisboa, Portugal
11. EpiReumaPt Investigation Team, Lisboa, Hospital Egas Moniz, Lisboa, Portugal
12. Department of Rheumatology, CHLO, Hospital Egas Moniz, Lisboa, Portugal