Impact Factor
4.24
Estimated influence, citation density, publishing volume, and citation integrity from the analytics table.
Volume, recency, access pattern, and citing-community signals from the journal analytics record.
Recent article records with DOI-first linking and condensed abstracts.
Description based on vol. 1(1) (2006); title from journal home page (publisher's Web site, viewed Apr. 8, 2008).
Latest issue consulted: 4(6) (2009) (viewed June 12, 2009).
Articles added consecutively to current issue.
Content on clinical trials included also in: PLoS hub for clinical trials (DLC) 2008222319 (OCoLC)228234657.