1 GlaxoSmithKline plc, Stockley Park West, Uxbridge, Middlesex, UK. margaret.x.tabberer@gsk.com.
2 GlaxoSmithKline plc, Research Triangle Park, NC, USA.
3 GlaxoSmithKline plc, Stockley Park West, Uxbridge, Middlesex, UK.
4 University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, UK.
5 UCL Respiratory, University College London, London, UK.
6 GlaxoSmithKline plc, Collegeville, PA, USA.
7 The Centre for Respiratory Medicine and Allergy, Institute of Inflammation and Repair, Manchester Academic Health Science Centre, University of Manchester, Manchester University NHS Foundation Trust, Manchester, UK.
8 The Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
9 Lewis Katz School of Medicine at Temple University, Philadelphia, PA, USA.
10 University of Copenhagen, Copenhagen, Denmark.
11 The Division of Pulmonary, Allergy, and Critical Care Medicine, Lung Health Center, University of Alabama at Birmingham, Birmingham, AL, USA.
12 University of Michigan, Pulmonary and Critical Care, Ann Arbor, MI, USA.
13 New York-Presbyterian Hospital/Weill Cornell Medical Center, New York, NY, USA.
14 Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.