Erratum: Corrigendum: IGFBP-4 is an inhibitor of canonical Wnt signalling required for cardiogenesis

Nature 454, 345–349 (2008); doi:10.1038/nature07027 It has recently been brought to our attention that some of the lanes in the reverse-transcriptase-mediated polymerase chain reaction (RT–PCR) analyses of this Letter appear to be duplicated. Specifically, two β-actin bands in Fig. 1c, lanes 1, 4 and 6 of the αMHC bands and lanes 1 and 6 of the GATA4 bands in Fig.