1. Paediatrics Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
2. Specialty School of Pediatrics, Alma Mater Studiorum, University of Bologna, Bologna, Italy
3. Clinica Pediatrica, Azienda Ospedaliero-Universitaria, Department of Medicine and Surgery, University of Parma, Parma, Italy
4. Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy