1. AUSL–IRCCS di Reggio Emilia, Servizio di Prevenzione e Sicurezza Negli Ambienti di Lavoro (SPSAL), Local Health Unit of Reggio Emilia, 42122 Reggio Emilia, Italy
2. Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
3. Department of Medicine DAME—Division of Pediatrics, University of Udine, 33100 Udine, Italy
4. Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy