Heyns, C. F. et al. Nat. Clin. Pract. Urol. 6, 32–43 (2009); doi:10.1038/ncpuro1273

In the January 2009 print issue of Nature Clinical Practice Urology, the images for Figure 2 and Figure 3 in the Review article by Heyns et al. were transposed. This has been corrected online [http://www.nature.com/nrurol/journal/v6/n1/full/ncpuro1273.html].