Affiliations

• ¹ Clinical Epidemiology Research and Training Unit, Boston University School of Medicine, Boston, Massachusetts, USA.
• ² Department of Immunology, University of Auckland, Auckland, New Zealand.
• ³ Department of Medicine, Otago University, Christchurch, Canterbury, New Zealand.
• ⁴ Department of Rheumatology, Pedro Ernesto University Hospital, Rio de Janeiro, Brazil.
• ⁵ Medicine/Rheumatology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA.
• ⁶ Department of Medicine, Birmingham VA Medical Center, Birmingham, Alabama, USA.
• ⁷ Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA.
• ⁸ Department of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, USA.
• ⁹ Servicio de Reumatologia, Hospital General de Mexico, Mexico City, Mexico.
• ¹⁰ Department of Medicine, University of Florida College of Medicine, Gainesville, Florida, USA.