1. Pole of Pneumology, ENT, and Dermatology, Institute of Experimental and Clinical Research, Université Catholique de Louvain, 1200 Brussels, Belgium
2. Postgraduate School in Respiratory Medicine, University of Torino, 10124 Torino, Italy
3. Department of Pneumology, Cliniques Universitaires Saint-Luc, 1200 Brussels, Belgium
4. Cystic Fibrosis Reference Centre, Cliniques Universitaires Saint-Luc, 1200 Brussels, Belgium
5. Department of Molecular Biotechnology and Health Sciences, University of Torino, 10126 Torino, Italy