Name	Info	Provider	Link
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=11371592.ui
SILVA SSU Database	free resource	SILVA	http://www.arb-silva.de/search/show/ssu/pubid/11371592
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/mbe/article-lookup/doi/10.1093/oxfordjournals.molbev.a003875