Name	Info	Provider	Link
	free resource	Medknow Publications and Media Pvt Ltd	http://www.njms.in/article.asp?issn=0975-5950;year=2010;volume=1;issue=2;spage=176;epage=178;aulast=Singh
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=22442594.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22442594/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/22442594