 The purpose of this project is to develop within a representative group of pediatric and adult EoE-experienced gastroenterologists and EoE-experienced pathologists an AI for this chronic inflammatory esophageal disease. The project is investigator initiated, but funding from different sources will be necessary. The project will be conducted in compliance with this protocol, with the ICH guideline E6 on Good Clinical Practice, the FDA perspectives on patient-reported outcomes to support medical product labeling claims 1,2, and the applicable regulatory requirements. 