1. Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, California;
2. Veterans Affairs Palo Alto Health Care System, Palo Alto, California;
3. Academic Respiratory Unit, University of Bristol, Bristol, United Kingdom;
4. North Bristol NHS Trust, Bristol, United Kingdom;
5. Becton, Dickinson and Company, Vernon Hills, Illinois;
6. Huntsville Heart Center Research, Huntsville, Alabama;
7. Freeman Hospital, Newcastle-upon-Tyne, United Kingdom;
8. Department of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts;
9. Division of Pulmonary, Allergy and Critical Care, Duke University School of Medicine, Durham, North Carolina;
10. Department of Pulmonary Medicine, Cleveland Clinic, Cleveland, Ohio;
11. Oxford Centre for Respiratory Medicine, Oxford University Hospitals NHS Trust, Oxford, United Kingdom;
12. Department of Respiratory Medicine, Great Western Hospitals NHS Foundation Trust, Swindon, United Kingdom;
13. Division of Pulmonary and Critical Care Medicine, Johns Hopkins University, Baltimore, Maryland;
14. Cancer Treatment Centers of America, Tulsa, Oklahoma;
15. Southwestern Regional Medical Center, Tulsa, Oklahoma;
16. Division of Pulmonary and Critical Care Medicine, University of North Carolina, Chapel Hill, North Carolina;
17. Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, Missouri;
18. Department of Thoracic Surgery and Interventional Pulmonology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts;
19. Huntsman Cancer Institute, Division of Pulmonary and Critical Care Medicine, University of Utah Health Sciences Center, Salt Lake City, Utah; and
20. Department of Medicine, University of Calgary, Calgary, Alberta, Canada