Eosinophilic EsophagitisEsophagitisEosinophiliaEsophagusEsophagitis, PepticEsophagoscopyDeglutition DisordersGastrointestinal DiseasesEosinophilsFood HypersensitivityPulmonary EosinophiliaGastroesophageal RefluxDiet TherapyDilatationOral SpraysEndoscopy, Digestive SystemDiet, Gluten-FreeMucous MembraneEsophageal StenosisEndoscopy, GastrointestinalInterleukin-5Esophageal PerforationEsophageal Motility DisordersProton Pump InhibitorsBiopsyEosinophil Major Basic ProteinFlatulenceCeliac DiseaseDyspepsiaAbdominal PainManometryUpper Gastrointestinal TractAllergensAbscessHeartburnInterleukin-13Retrospective StudiesImmunoglobulin EAngiolymphoid Hyperplasia with EosinophiliaGastroparesisConstipationGlucocorticoidsHernia, HiatalTreatment Outcome