Following the publication of our article [1] we noticed an error in the article PDF.

Due to a production error, the final two sentences of the legend to figure 2a are incomplete. These two sentences should appear as follows:

The characters represent cluster memberships of each tumour with BRCA1 and BRCA2 abnormalities indicated, see bottom of the figure. It can be hypothesised here that component three reflects differences between BRCA1- and BRCA2-related tumours whereas component two reflects their similarities, see further in Additional data file 3.