Correction to: BMC Pulmonary Medicine (2020) 20:252 https://doi.org/10.1186/s12890-020-01292-7

Following publication of the original article [1], the authors flagged that the following funding statement had been omitted from the Funding declaration: This work was supported by research grants from Daegu Catholic University in 2019.


The published article has now been updated with this declaration.