1. Otorhinolaryngology and Audiology, Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy
2. Clinical Epidemiology and Public Health Research Unit, Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy
3. University of Trieste School of Medicine, Trieste, Italy
4. Department of Pediatrics, Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy