TP53 and lymphoma: Parallel cell lines derived from Runx1wt/wt/Mx1Cre+/p53+/−/Eμ‐Myc lymphomas were refractory to interferon β with respect to Sgpp1 and Runx1 expression [Borland et al., 2016] thereby excluding a non‐specific effect of the Mx1Cre recombinase as a causative factor for the increase in Sgpp1 expression following Runx1 excision.