1. Department of Otorhinolaryngology - Head and Neck Surgery and Audiology, Copenhagen University Hospital, Rigshospitalet, Denmark
2. Danish PCD & chILD Centre, CF Centre Copenhagen, Paediatric Pulmonary Service, Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital, Rigshospitalet, Denmark
3. Copenhagen CF Centre, Rigshospitalet, Denmark
4. Department of Clinical Microbiology, Copenhagen University Hospital, Rigshospitalet, Denmark