Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=&volume=44&issue=1&spage=262&aulast=Bortot
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=31115488.ui
	subscription/membership/fee required	Spandidos Publications	https://www.spandidos-publications.com/ijmm/44/1/262