Nat. Biotechnol. 28, 295–297 (2010); published online 8 April 2010; corrected after print 9 July 2010

In the version of this article initially published, some of the oligos in Table 1 are described as phosphorothioate modified. In fact, all antisense oligonucleotides are phosphorothioate-modified oligos. In addition, Lucanix, which is not an antisense oligo, has been removed from the table. The error has been corrected in the HTML and PDF versions of the article.