Correction

Of the 11 cell lines described in Hwang et al. (W. S. Hwang et al. Science 308, 1777–1783; 2005) mentioned in our News story “TV tests call into question cloner's stem-cell success” (Nature 438, 718; 200510.1038/438718b), it was originally claimed that seven could divide into different cell types, a figure subsequently revised down to three in a formal correction. And the text specifying the contribution of Gerald Schatten and his colleagues at the University of Pittsburgh was amended during routine copy-editing between the paper being posted online in May and its appearance in print in June.