1. Division of Pulmonary, Allergy and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama;
2. Institut Respiratori (Clinic Barcelona), Càtedra Salut Respiratoria (Universitat de Barcelona), Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS-Barcelona), Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), España;
3. Faculty of Life Sciences and Medicine, School of Immunology and Microbial Sciences, King’s College London, London, United Kingdom;
4. Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, San Francisco, California;
5. Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania;
6. VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania;
7. National Heart and Lung Institute, Imperial College London, London, United Kingdom;
8. Centre for Heart Lung Innovation and
9. Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada;
10. St. Paul’s Hospital, Vancouver, British Columbia, Canada; and
11. Weill Cornell Medicine/NewYork-Presbyterian Hospital, New York, New York