1 Primary Ciliary Dyskinesia Centre, NIHR Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom; University of Southampton Faculty of Medicine, Academic Unit of Clinical and Experimental Medicine, Southampton, United Kingdom. Electronic address: jlucas1@soton.ac.uk.
2 Primary Ciliary Dyskinesia Centre, NIHR Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom; University of Southampton Faculty of Medicine, Academic Unit of Clinical and Experimental Medicine, Southampton, United Kingdom.
3 Department of Respiratory Sciences, Centre for PCD Diagnosis and Research, University of Leicester, Robert Kilpatrick Clinical Sciences Building, Leicester Royal Infirmary, Leicester, United Kingdom.
4 Departments of Paediatrics and Paediatric Respiratory Medicine, Primary Ciliary Dyskinesia Centre, Imperial College and Royal Brompton Hospital, London, United Kingdom.
5 Department of Respiratory Sciences, Centre for PCD Diagnosis and Research, University of Leicester, Robert Kilpatrick Clinical Sciences Building, Leicester Royal Infirmary, Leicester, United Kingdom; UCL Great Ormond Street Institute of Child Health and Great Ormond Street Hospital NIHR Biomedical Research Centre, Leicester, United Kingdom.
6 National Institute of Health Research Design Service South Central, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom.
7 Departments of Paediatrics and Paediatric Respiratory Medicine, Primary Ciliary Dyskinesia Centre, Imperial College and Royal Brompton Hospital, London, United Kingdom; Scottish Centre for Respiratory Research, Division of Molecular and Clinical Medicine, University of Dundee, Dundee, United Kingdom.