Correction to: Nature, published online 12 September 2018.

In this Article, the pCaMIN transposon plasmid consisted of ‘mouse Myc and mouse NrasG12V’ instead of ‘mouse Myc and human NRASG12V’, and the pCAMIA construct consisted of ‘mouse Myc and human AKT1’ instead of ‘mouse Myc and Akt1’; this has been corrected online throughout the Article.