The original version of this Article contained an error in Fig. 4. In the original Fig. 4a (shown below), different quadrants within the same FACS plot and between different plots contained similar unexplained groups of data points. The raw data of the original figure are not available as they were deleted at the FACS facility where the analysis was performed. The experiments have several original replicates, for which raw data are available. The experiments have also been repeated for added robustness and the new version of Fig. 4a is shown below. This has been corrected in both the PDF and HTML versions of the Article. (Figure presented.). The original conclusion of a significant increase in CD24+/CD29-high mammary epithelial cells in DTG vs. control mice (as shown in Fig. 4a) remains unchanged and was already supported by the original Fig. 8i. In addition, repeats, gating strategies and raw data of Fig. 4a as well as gating strategies and raw data of the original Fig. 8i have been deposited in figshare (https://doi.org/10.6084/m9. figshare.13013813).