. 2010 Jan 27;24(5):845–858. doi: 10.1053/j.jvca.2009.11.007

Table 3.

RCTs, Cohort Studies, Case-Control Studies, and Case Series/Reports^⁎

Resource	Vendor/Supplier	Availability	Cost	URL
MEDLINE	U.S. National Library of Medicine and National Institutes of Health	^⁎PubMed interface to the MEDLINE® database, ^⁎Ovid MEDLINE by WoltersKluwer ^⁎Scopus, an Elsevier product	PubMed Gateway is free to use. Individual subscription available for Ovid's interface to Medline	www.ncbi.nlm.nih.gov/pubmed http://www.ovid.com
PubMed Clinical Queries	U.S. National Library of Medicine and National Institutes of Health	^⁎PubMed ^⁎SumSearch ^⁎TRIP	Free	www.ncbi.nlm.nih.gov/entrez/query/static/clinical.html
EMBASE	Elsevier	^⁎Elsevier's EMBASE site ^⁎Scopus	Need to use institution subscription	http://embase.com/
Scopus	Elsevier	Elsevier's Scopus site	Only provides institutional licenses	http://scopus.com

^⁎

It is important to check with the medical library with which the clinician is affiliated with to find out if fee-based resources can be accessed through the library's institutional subscription or license to the above resources.