Addendum to: Cell Death and Differentiation (1999) 6, 652–660

The authors note: ‘The marker in Figures 2a and 4 is identical, being from the same identical experiment that was then presented in two separate figures for editorial reasons. The marker in Figures 3a and 6b is identical, being from the same identical experiment that was then presented in two separate figures for editorial reasons. Both experiments were performed in 1997, and submitted at the end of 1998 (received 15.1.1999). At that time it was not required to insert a blank line of separation, as it is mandatory in these days. There is no evidence of wrongdoing, hence the results and conclusion remain valid. We thank the alert reader for bringing this issue to our attention, and we deeply apologize to readers for the erroneous labeling.’