In the paper ‘p27Kip1 accumulation is associated with retinoic-induced neuroblastoma differentiation: evidence of a decreased proteasome-dependent degradation’ by A Borriello et al., Oncogene, 2000, 19, 51–60, the affiliation for the fifth author, Gian Paola Tonini, was incorrect. The correct address is Laboratory of Population Genetics, National Institute for Cancer Research (IST), Genova, Italy.