Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/JCDR-3-290
	free resource	Medknow Publications and Media Pvt Ltd	http://www.jcdronline.com/article.asp?issn=0975-3583;year=2012;volume=3;issue=4;spage=290;epage=295;aulast=Akintunde
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23233773/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/23233773