Name	Info	Provider	Link
	subscription/membership/fee required	HighWire	https://rapm.bmj.com/lookup/pmidlookup?view=long&pmid=29219935
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/29219935/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/29219935
	free resource	scite Smart Citations	https://scite.ai/reports/29219935