Hannah Rafferty

Addendum to: Nature Medicine https://doi.org/10.1038/nm.3750, published online 1 December 2014. In the version of this article initially published, we reported paired immunohistochemical staining of Ki67 and CDKN2A/p16INK4A on serial sections of Vil1-Grem1 mouse polyps (Fig. 2e) and human traditional serrated adenomas (TSAs; Supplementary Fig. 7d), which we interpreted as showing loss of CDKN2A/p16INK4A expression in proliferating ectopic crypt cells.