Name	Info	Provider	Link
	free resource	BioMed Central	https://bmcpublichealth.biomedcentral.com/articles/10.1186/s12889-018-6181-3
Polio and Post-Polio Syndrome	free resource	MedlinePlus Health Information	https://medlineplus.gov/polioandpostpoliosyndrome.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30541484/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/30541484