Name	Info	Provider	Link
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30974049/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/30974049
	free resource	COPD Foundation	https://doi.org/10.15326/jcopdf.6.2.2018.0152
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:30974049