T Itagaki, I Shimizu, X Cheng, et al. Opposing effects of oestradiol and progesterone on intracellular pathways and activation processes in the oxidative stress induced activation of cultured rat hepatic stellate cells. Gut 2005;54:1782–9. This article was originally published with an incorrect digital object identifier (doi). It has been updated with the correct doi: 10.1136/gut.2004.053728. We apologise for any inconvenience caused.