ABPA allergic bronchopulmonary aspergillosis ACT airway clearance technique BACI Bronchiectasis Aetiology Comorbidity Index BAL bronchoalveolar lavage BCI Bronchiectasis Comorbidity Index BCOS bronchiectasis–COPD overlap syndrome BHQ Bronchiectasis Health Questionnaire BMI body mass index BSI Bronchiectasis Severity Index CF cystic fibrosis CFTR cystic fibrosis transmembrane conductance regulator COPD chronic obstructive pulmonary disease CT computed tomography E-FACED severe exacerbation FACED FACED FEV1 (50%=0 points, ≤50%=2 points), age (≤70 years=0 points, 70 years=2 points), chronic colonisation (no Pseudomonas aeruginosa=0 points, P. aeruginosa=1 point), extension (less than or equal to two lobes affected=0 points, more than two lobes affected=1 point), dyspnoea (2 on the modified Medical Research Council dyspnoea scale=0 points, ≥2 on Medical Research Council scale=1 point) FeNO fractional exhaled nitric oxide FEV1 forced expiratory volume in 1 s FVC forced vital capacity HRCT high-resolution computed tomography IBD inflammatory bowel disease IFN interferon Ig immunoglobulin IL interleukin MAC Mycobacterium avium complex MRI magnetic resonance imaging MRSA methicillin-resistant Staphylococcus aureus NTM nontuberculous mycobacteria PCD primary ciliary dyskinesia PEP positive expiratory pressure RCT randomised controlled trials TB tuberculosis TNF- tumour necrosis factor- List of abbreviations