1. Department of Experimental and Clinical Medicine, Division of Rheumatology AOUC, University of Firenze, Firenze, Italy
2. Interdisciplinary Dept of Medicine, division of Rheumatology, University of Bari, Bari, Italy
3. Department of Rheumatology A and INSERM U1016, Paris Descartes University, Cochin Hospital, Paris, France
4. Department of Rheumatology, University Hospital Zurich, Zurich, Switzerland
5. Department Of Clinical and Molecular Sciences, Clinica Medica, University ‘Politecnica delle Marche’, Ancona, Italy