1. Division of Rheumatology, Allergy, and Immunology, Tufts Medical Center , Boston, MA, USA
2. Department of Radiology, Brigham and Women’s Hospital and Harvard Medical School , Boston, MA, USA
3. Department of Radiology, South Nuremberg Hospital , Nuremberg, Germany
4. Department of Rheumatology, Diakonhjemmet Hospital , Oslo, Norway
5. Alpert Medical School of Brown University , Providence, RI, USA
6. Center for Primary Care and Prevention , Pawtucket, RI, USA
7. Brown University School of Public Health , Providence, RI, USA
8. Department of Public Health Sciences, University of Connecticut Health Center , Farmington, CT, USA