Correction

Progress in Human Somatic-Cell Nuclear Transfer

N Engl J Med 2006; 355:429July 27, 2006

Article

Progress in Human Somatic-Cell Nuclear Transfer (Clinical Implications of Basic Research, N Engl J Med 2005:353;87 - 88) . With regard to the last two sentences in the first full paragraph on page 88, it should be noted that the embryonic stem cells used in the studies by Perrier et al.⁴ and Tabar et al.⁵ were derived by the standard method, rather than by nuclear transfer. In addition, the article that was discussed, a report by Woo-Suk Hwang et al. (Hwang WS, Roh SI, Lee BC, et al. Patient-specific embryonic stem cells derived from human SCNT blastocysts. Science 2005;308:1777-83.), has been retracted.