1 Rheumatology and Clinical Immunology Unit, Azienda Socio-Sanitaria Territoriale Spedali Civili, Brescia, Italy.
2 Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy.
3 Maulana Azad Medical College, New Delhi, Delhi, India.
4 Division of Clinical Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.
5 Department of Rheumatology, Danish Hospital for Rheumatic Diseases, Sønderborg, Denmark.
6 Department of Regional Health Research (IRS), University of Southern Denmark, Odense, Denmark.
7 Thrombosis and Haemophilia Centre, Guy's and St Thomas' NHS Foundation Trust, London, UK.
8 Department of Clinical Immunology and Rheumatology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India.
9 Division of Rheumatology and Clinical Immunology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
10 Department of Rheumatology, Royal Wolverhampton Hospitals NHS Trust, Wolverhampton, UK.
11 Department of Rheumatology, City Hospital, Sandwell and West Birmingham Hospitals NHS Trust, Birmingham, UK.
12 Centre for Musculoskeletal Research, Division of Musculoskeletal and Dermatological Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK.