Name	Info	Provider	Link
	free resource	Medknow Publications and Media Pvt Ltd	http://www.jfcmonline.com/article.asp?issn=2230-8229;year=1998;volume=5;issue=1;spage=13;epage=19;aulast=Alhamad
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23008578/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/23008578