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Contributors MDH suggested the initial idea which was then developed into a Pulmonary Puzzle piece by BC, MDH and DM-R. The original draft was written by BC which was then developed and edited by MDH, DM-R and AC.
Funding National Institute for Health Research (No direct funding. BC is in receipt of an NIHR Academic Clinical Fellowship).
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
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