1 Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, delta 6 building, PO Box 67100, L'Aquila, Italy. Electronic address: piero.ruscitti@univaq.it.
2 Medicine & Rheumatology Unit, IRCCS Istituto Ortopedico Rizzoli (IOR), 40136 Bologna, Italy; Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, 40125 Bologna, Italy.
3 Zabludowicz Center for Autoimmune Diseases, Sheba Medical Center, Tel HaShomer 5265601, Israel; Sackler Faculty of Medicine, Ariel University, Ariel 40700, Israel; Laboratory of the Mosaic of Autoimmunity, Saint-Petersburg State University, 199034 St. Petersburg, Russia.