Nat. Biotechnol. 26, 1063–1066 (2008); published online 18 August 2008, doi: 10.1038/bioe.2008.8; corrected after print 5 December 2008

In the version of this article initially published, the amount of money raised in Amsterdam Molecular Therapeutics' initial public offering, recorded in Table 2 as €25 million, was incorrect. The correct amount is €56 million. The error has been corrected in the PDF version of the article and in the HTML version on the Bioentrepreneur portal.