Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=0025-7079&volume=59&issue=5&spage=418&aulast=Lee
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=33528231.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/33528231/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/33528231
	free resource	scite Smart Citations	https://scite.ai/reports/33528231
	subscription/membership/fee required	Wolters Kluwer	https://doi.org/10.1097/MLR.0000000000001510