1. Institute of Diagnostic Medicine of Cariri, Juazeiro do Norte, Brazil;
2. Johns Hopkins Arthritis Center, Johns Hopkins University School of Medicine, Baltimore, Maryland;
3. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom;
4. Division of Rheumatology, Allergy and Immunology, University of Puerto Rico, San Juan, Puerto Rico;
5. Division of Rheumatology, Inflammation, and Immunity, Harvard Medical School Clinical, Boston, Massachusetts;
6. Section of Rheumatology, Yale University School of Medicine, New Haven, Connecticut