Eosinophilic EsophagitisEsophagitisEosinophiliaEsophagusEsophagitis, PepticEsophagoscopyDeglutition DisordersGastrointestinal DiseasesFood HypersensitivityGastroesophageal RefluxDiet TherapyDilatationEosinophilsOral SpraysEndoscopy, Digestive SystemDiet, Gluten-FreeMucous MembraneEsophageal StenosisEndoscopy, GastrointestinalEsophageal PerforationEsophageal Motility DisordersProton Pump InhibitorsBiopsyFlatulenceEosinophil Major Basic ProteinCeliac DiseaseDyspepsiaAbdominal PainManometryUpper Gastrointestinal TractInterleukin-5AbscessHeartburnGastroparesisRetrospective StudiesConstipationHernia, HiatalGlucocorticoids