Name	Info	Provider	Link
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=20943668.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/20943668/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/20943668
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:20943668
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/cercor/article-lookup/doi/10.1093/cercor/bhq190