Nature Medicine 12, 557–567 (2006); published online 30 April 2006; corrected after print 14 July 2006

In the version of this article initially published, one of the micrographs in Figure 4d was incorrect. In Figure 4d, the micrograph showing CD31 staining of AdNull-treated adductor muscle is overlapping with the micrograph showing CD31 staining of the AdNull-treated gastrocnemius muscle. The authors of the article have indicated that the micrograph shown for the adductor muscle was incorrectly included due to an inadvertent error during manuscript preparation, and that the error does not affect the quantitative results shown in Figure 4d or any of the conclusions of the article.

The error has been corrected in the HTML and PDF versions of the article.