Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=1019-6439&volume=24&issue=4&spage=869&aulast=Aleem
	subscription/membership/fee required	Spandidos Publications	https://www.spandidos-publications.com/ijo/24/4/869