Name	Info	Provider	Link
	subscription/membership/fee required	Atypon	https://journals.sagepub.com/doi/10.1046/j.1440-1614.2002.00983.x?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=11929434.ui
	subscription/membership/fee required	Wiley	https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0004-8674&date=2002&volume=36&issue=1&spage=4