1. Department of Otorhinolaryngology, Children’s Hospital “Ospedale Pediatrico Bambino Gesù—IRCCS”, 00165 Rome, Italy
2. Department of Cystic Fibrosis, Children’s Hospital “Ospedale Pediatrico Bambino Gesù—IRCCS”, 00165 Rome, Italy
3. Faculty of Medicine and Surgery, University “Università Degli Studi Tor Vergata di Roma”, 00133 Rome, Italy
4. Department of Allergology, Children’s Hospital “Ospedale Pediatrico Bambino Gesù—IRCCS”, 00165 Rome, Italy