Name	Info	Provider	Link
	subscription/membership/fee required	Atypon	https://www.jmcp.org/doi/10.18553/jmcp.2021.20514?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
COPD	free resource	MedlinePlus Health Information	https://medlineplus.gov/copd.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/33764161/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/33764161