Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=0029-7844&volume=142&issue=5&spage=1217&aulast=Manske
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=37797333.ui
	subscription/membership/fee required	Wolters Kluwer	https://doi.org/10.1097/AOG.0000000000005394