Name	Info	Provider	Link
	free resource	BioMed Central	https://respiratory-research.biomedcentral.com/articles/10.1186/1465-9921-9-21
Emphysema	free resource	MedlinePlus Health Information	https://medlineplus.gov/emphysema.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18271964/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/18271964
CT Scans	free resource	MedlinePlus Consumer Health Information	https://medlineplus.gov/ctscans.html