1 Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA. Electronic address: fpolverino@copdnet.org.
2 Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
3 Department of Pediatrics, National Jewish Health, Denver, CO, USA.
4 Department of Pediatrics, Cincinnati Children's Hospital, Cincinnati, OH, USA.
5 Department of Anesthesiology, Pharmacology & Therapeutics, Center for Heart and Lung Innovation, University of British Columbia, Vancouver, BC, Canada.
6 Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA.
7 Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium.
8 Allergy and Lung Health Unit, School of Population and Global Health, The University of Melbourne, Melbourne, VIC, Australia.