Name	Info	Provider	Link
	free resource	JMIR Publications	https://www.jmir.org/2017/5/e185/
COPD	free resource	MedlinePlus Health Information	https://medlineplus.gov/copd.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/28566268/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/28566268
	free resource	scite Smart Citations	https://scite.ai/reports/28566268