Nat. Biotechnol. 21, 865–870 (2003)

In Box 3 of the article on p. 868, it was stated that the Dutch company Pharming NV went bankrupt in 2001. In that year the company did go into receivership and its subsidary (Pharming intellectual property BV) was declared bankrupt. We fully accept, however, that Pharming itself did not go bankrupt. Pharming continues to trade successfully and currently has a number of products in both preclinical and clinical trials. NBT regrets the error.