The rIL-18-treated ΔdblGATA mice showed several characteristics of EoE including intraepithelial eosinophils (Fig. 3a, ii), Ki-67+ epithelial cell proliferation (Fig. 3b, i–ii), and accumulation of collagen in esophageal tissue sections (Fig. 3c, i–ii). Here, MKI67 is linked to eosinophilic esophagitis.