1. Department of Pediatrics, University of Pavia - Foundation IRCCS Policlinico San Matteo, Pavia, Italy
2. Department of Otorhinolaryngology - Foundation IRCCS Policlinico San Matteo, Pavia, Italy
3. Department of Pediatrics, Unit of Pediatric Genetics and Immunology, University of Messina, Italy
4. Department of Pediatric Surgery, University of Pavia - Foundation IRCCS Policlinico San Matteo, Pavia, Italy