Our editing process unfortunately led to an error into the labelling of the graph at the start of our summary paragraphs (“Cell salvage during surgery reduces need for blood”) in the issue of 1 June. The x axis on the graph (number of units of allogenic blood transfused) should be labelled 0 to 4 [not 1-5]. The labelling of the related graph in the main paper, by Neil McGill and colleagues (pp 1299-303), is correct.
