1. Department of Autoimmune Diseases, Hospital Clínic, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Catalonia, Spain
2. Systemic Autoimmune Diseases Unit, Hospital Mútua de Terrassa, Terrassa, Catalonia, Spain
3. Division of Rheumatology, Department of Medicine, McMaster University, Hamilton, Canada
4. Barbara Volcker Center for Women and Rheumatic Diseases, Hospital for Special Surgery, Weill Cornell Medicine, New York, USA