Name	Info	Provider	Link
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=22900599.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22900599/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/22900599
	free resource	Wiley	https://doi.org/10.1111/j.1365-2591.2012.02099.x
SILVA LSU Database	free resource	SILVA	http://www.arb-silva.de/search/show/lsu/pubid/22900599