Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=&volume=27&issue=8&spage=605&aulast=Lee
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	subscription/membership/fee required	Wolters Kluwer	https://doi.org/10.1097/WNR.0000000000000584