Name Info Provider Link
free resource Medknow Publications and Media Pvt Ltd http://www.e-ijd.org/article.asp?issn=0019-5154;year=2011;volume=56;issue=5;spage=578;epage=580;aulast=Kumar
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=22121284.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22121284/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/22121284