Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=1019-6439&volume=2&issue=6&spage=1043&aulast=Kelland
	subscription/membership/fee required	Spandidos Publications	https://www.spandidos-publications.com/ijo/2/6/1043