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The original legend for Figure 1c failed to note that the cells derived from cattle embryos were embryonic stem cell (ESC)-like trophectoderm cell colonies. The full legend for Figure 1c should read \u201cTherapeutic cloning: percentage ESC line derivation (mice) or ESC-like 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.","order":4,"name":"change_details","label":"Change Details","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"The authors declare no competing financial interests.","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}]}}