Name	Info	Provider	Link
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=29923523.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/29923523/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/29923523
	free resource	Scientific Scholar	https://doi.org/10.4103/ijmr.IJMR_1236_16
	free resource	scite Smart Citations	https://scite.ai/reports/29923523
	free resource	Wolters Kluwer	https://doi.org/10.4103/ijmr.IJMR_1236_16