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LDB and WM contributed equally.
Contributors LDB and WM contributed equally to this editorial.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests WM is a consultant to the Cystic Fibrosis Foundation (CFF) and receives grant funding from the CFF and the National Institutes of Health. He has received speaking fees from the American College of Chest Physicians and the American Thoracic Society. LDB has no competing interests.
Provenance and peer review Commissioned; externally peer reviewed.
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