Flow cytometric analysis for CD26 (Dpp4) and CD34 expression confirmed that iCAFs represent a substantial fraction of the EYFP+ PDPN+ tumor fibroblasts and that the subsets of Ly6C+ CD34+ and Sca-1+ CD34+ fibroblasts were significantly expanded after artLCMV treatment (Fig. 5d and Supplementary Fig. 5g). This evidence concerns the gene DPP4 and neoplasm.