1. Cystic Fibrosis Centre, Pediatric Division Hospital San Carlo Potenza Italy
2. Italian Cystic Fibrosis Registry Istututo Superiore di Sanità Rome Italy
3. Adult Unit, Department of Translational Medical Science, Cystic Fibrosis Centre Federico II University of Naples Naples Italy
4. Cystic Fibrosis Centre Bambino Gesù Children's Hospital, IRCCS Rome Italy
5. Department of Paediatrics, Cystic Fibrosis Regional Support Centre, ASST Spedali Civili Brescia University of Brescia Brescia Italy
6. LIFC Lega Italiana Fibrosi Cistica ‐ ONLUS Italian Cystic Fibrosis League Rome Italy
7. Undiagnosed Rare Diseases Unit National Centre for Rare Diseases, Istituto Superiore di Sanità Rome Italy
8. Department of Medical‐Surgical Sciences and Translational Medicine, Faculty of Medicine and Psychology La Sapienza University of Rome Rome Italy