Nature Reviews Cancer 11, 50–58 (2011)

On page 51 of this article, it was stated that “The identification of CED-9 as a homologue of BCL-2 (REF. 16) has been cited as the 'Aha!' moment of discovery in the work on programmed cell death20, as it suggested that the mechanism was evolutionarily conserved in animals. The conservation of this crucial function in cell death was supported by experiments in which human BCL-2 expression rescued the cell death phenotype that is evident in ced 9 mutants17,21.” The citation of reference 16 in the first sentence is incorrect and should have been reference 17. In addition, the references at the end of the second sentence should have been references 16 and 21 and not 17 and 21.