Name	Info	Provider	Link
	free resource	Medknow Publications and Media Pvt Ltd	http://www.carcinogenesis.com/article.asp?issn=1477-3163;year=2009;volume=8;issue=1;spage=3;epage=3;aulast=Pontes-Junior
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19240373/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/19240373