1. Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland;
2. Department of Pulmonary Medicine and Critical Care, University of Texas and South Texas Veterans Health Care System, San Antonio, Texas;
3. Clinical Science Centre, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, United Kingdom;
4. Pulmonary Division, Brigham and Women’s Hospital, Boston, Massachusetts;
5. Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California;
6. Respiratory Medicine, Boehringer Ingelheim International GmbH, Ingelheim am Rhein, Germany; and
7. Biostatistics and Data Sciences Europe, Boehringer Ingelheim Pharma GmbH and Company KG, Biberach an der Riss, Germany