J T Parissis, S Adamopoulos, D Farmakis, et al. Heart 2006;92:1768–72. Effects of serial levosimendan infusions on left ventricular performance and plasma biomarkers of myocardial injury and neurohormonal and immune activation in patients with advanced heart failure. This article was originally published with an incorrect digital object identifier (doi). It has been updated with the correct doi: 10.1136/hrt.2005.079707. We apologise for any inconvenience caused.