corrigenda

Scientific publications should be seen as 'living documents', with corrigenda an accepted — if unwelcome — part of scientific progress.

All the conclusions of the original Letter are intact except for the data for the original Fig. 4f and g on the phosphorylation level of c-Jun and JNK in the livers of CD95-deficient mice, which have been corrected in two previous Corrigenda: and .

A. Hadji and S. DeChant from Northwestern University generated data for the corrigenda.

The listed Addenda & Corrigenda have been applied.

The listed Addenda & Corrigenda have been applied.