1 Research Laboratory and Academic Division of Clinical Rheumatology, Department of Internal Medicine.
2 Laboratory for Autoimmunity, Department of Internal Medicine, University of Genova, IRCCS Ospedale Policlinico San Martino, Genova.
3 Biostatistics Section, Department of Health Sciences, University of Genova, Genova, Italy.
4 Department of Rheumatology, Ghent University Hospital, Department of Internal Medicine, VIB Inflammation Research Centre - Ghent University, Ghent, Belgium.