Name	Info	Provider	Link
	free resource	HighWire	https://publications.ersnet.org/lookup/pmidlookup?view=long&pmid=17959643
COPD	free resource	MedlinePlus Health Information	https://medlineplus.gov/copd.html
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:17959643