1. Ca’ Foncello Hospital, Cystic Fibrosis Center, Treviso, Italy.
2. G. Gaslini Institute, Cystic Fibrosis Center, Genoa, Italy.
3. University of Padua, Pediatrics Department, Padua, Italy.
4. Sapienza University, Department of Pediatrics, Cystic Fibrosis Center, Rome, Italy.
5. Azienda Ospedaliera Universitaria di Verona, Cystic Fibrosis Center, Verona, Italy.