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	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=22668978.ui
See the articles recommended by the Faculty of more than 8,000 leading experts in Biology and Medicine.	subscription/membership/fee required	H1 Connect	https://facultyopinions.com/pubmed/22668978
	free resource	scite Smart Citations	https://scite.ai/reports/22668978
	subscription/membership/fee required	Wolters Kluwer	https://doi.org/10.1097/IJG.0b013e31825af0eb