1. Lung Investigation Unit, Medicine, University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital Birmingham, Birmingham, United Kingdom
2. Department of Respiratory Medicine, Royal Devon & Exeter Hospital, Exeter, United Kingdom
3. Pulmonary and Critical Care Department, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts; and
4. Medicines Evaluation Unit, University of Manchester, Manchester University NHS Foundation Hospital Trust, Manchester, United Kingdom