Name	Info	Provider	Link
	free resource	Medknow Publications and Media Pvt Ltd	http://www.jmp.org.in/article.asp?issn=0971-6203;year=2007;volume=32;issue=1;spage=18;epage=23;aulast=Sharma
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=21217914.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21217914/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/21217914