Name Info Provider Link
subscription/membership/fee required Ingenta plc http://jmm.microbiologyresearch.org/pubmed/content/journal/jmm/10.1099/jmm.0.034124-0
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=21903824.ui