Name	Info	Provider	Link
X-Rays	free resource	MedlinePlus Health Information	https://medlineplus.gov/xrays.html
	subscription/membership/fee required	Nature Publishing Group	https://doi.org/10.1038/s41565-018-0086-2
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/29581551/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/29581551
	free resource	scite Smart Citations	https://scite.ai/reports/29581551