Name	Info	Provider	Link
COPD	free resource	MedlinePlus Health Information	https://medlineplus.gov/copd.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23670515/
	free resource	Scientific Electronic Library Online	https://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-37132013000200021&lng=en&nrm=iso&tlng=en
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/23670515
	free resource	scite Smart Citations	https://scite.ai/reports/23670515