Name	Info	Provider	Link
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=16013993.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/16013993/
	subscription/membership/fee required	Taylor & Francis	https://www.tandfonline.com/doi/full/10.2217/14622416.6.5.451
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/16013993