Laboratory of Experimental Rheumatology and Division of Rheumatology, University of Genoa, Genova, Liguria, Italy mcutolo@unige.it. Clinical Rheumatology Unit, IRCCS San Martino Polyclinic Hospital, Genova, Italy. Laboratory of Experimental Rheumatology and Division of Rheumatology, University of Genoa, Genova, Liguria, Italy. Department of Rheumatology, Ghent University Hospital, Ghent, Belgium. Department of Internal Medicine, Ghent University, Ghent, Belgium.