IL1RL1 and eosinophilic esophagitis: IL-33 is able to promote EoE development in mice (Judd et al., 2016) and a murine model of EoE based on epicutaneous OVA sensitization followed by intranasal OVA challenge, revealed that the IL-33–ST2 axis, together with the expression of ST2 on basophils, were required to induce EoE (Venturelli et al., 2016).