1 Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, Michigan, United States.
2 Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, United States.
3 University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, United Kingdom.
4 Clinical Research Institute and Altitude Clinical Consulting, Medford, Oregon, United States.
5 Precise Approach Ltd, London, United Kingdom.
6 GSK, Collegeville, Pennsylvania, United States.
7 Pulmonary, Allergy, and Critical Care Division, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States.
8 Division of Pulmonology and Critical Care Medicine, Weill Cornell Medicine, New York, New York, United States.
9 Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States.
10 Centre for Respiratory Medicine and Allergy, Institute of Inflammation and Repair, Manchester Academic Health Science Centre, University of Manchester, Manchester University National Health Service Foundation Trust, Manchester, United Kingdom.