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	subscription/membership/fee required	Nature Publishing Group	https://doi.org/10.1038/nature06936
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=18464734.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18464734/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/18464734
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/18464734
SILVA SSU Database	free resource	SILVA	http://www.arb-silva.de/search/show/ssu/pubid/18464734