Xiangzhong Yang, Sadie L Smith, X Cindy Tian, Harris A Lewin, Jean-Paul Renard & Teruhiko Wakayama Nat. Genet. 39, 295–302 (2007); published online 26 February; corrected after print 26 September 2007

In the version of this article initially published, the legend for Figure 1 is inaccurate. The original legend for Figure 1c failed to note that the cells derived from cattle embryos were embryonic stem cell (ESC)-like or trophectoderm cell colonies. The full legend for Figure 1c should read “Therapeutic cloning: percentage ESC line derivation (mice) or ESC-like or trophectoderm cell colony formation (cattle) from embryos derived from both IVF and nuclear transfer.” This error has been corrected in the HTML and PDF versions of the article.