The ceritinib and crizotinib IC50s for CK8/18-positive cells in the MGH051-1 culture (Figure S4) were nearly identical (53 and 60 nM, respectively), consistent with the crizotinib IC50 for the finished, pure cancer cell line that we previously reported (Friboulet et al., 2014). Here, KRT8 is linked to cancer.