Name	Info	Provider	Link
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30417987/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/30417987
	free resource	Silverchair Information Systems	https://academic.oup.com/stcltm/article-lookup/doi/10.1002/sctm.15-0399