Nat. Biotechnol. 27, 129–139 (2009); published online 7 February 2009; corrected after print 7 June 2010

In the version of this article initially published, the Mologen product description in Table 5, page 139, was incomplete and its status incorrectly stated to be compassionate use in India. The product description should have read: Genetically modified allogeneic (human) tumor cells for the expression of IL-7, GM-CSF, CD80 and CD154, in fixed combination with a DNA-based double stem loop immunomodulator (dSLIM). The status should have read: Orphan drug status granted by EMEA in 2006. The error has been corrected in the HTML and PDF versions of the article.