1 Department of Medical, Oral and Biotechnological Sciences, Laboratory of Molecular Medicine, University "G. d'Annunzio" Chieti-Pescara, Chieti, Italy.
2 Department of Medicine, University of Verona & AOUI Verona, Verona, Italy.
3 Department of Medical, Oral and Biotechnological Sciences, Laboratory of Biostatistics, University "G. d'Annunzio" Chieti-Pescara, Chieti, Italy.
4 Institute of Rheumatology, Università Cattolica del Sacro Cuore & Fondazione Policlinico Gemelli, Rome, Italy.