Name	Info	Provider	Link
Collapsed Lung	free resource	MedlinePlus Health Information	https://medlineplus.gov/collapsedlung.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/33231715/
	subscription/membership/fee required	Springer	https://dx.doi.org/10.1007/s00101-020-00888-2
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/33231715