Barrett EsophagusEsophageal DiseasesEsophagusEsophageal StenosisEsophageal NeoplasmsMetaplasiaPrecancerous ConditionsGenes, MCCAdenocarcinomaCardiaGastroesophageal RefluxEndoscopy, GastrointestinalEsophagoscopyDisease ProgressionImmunohistochemistryEsophagogastric JunctionEsophagectomyMucous MembraneHernia, HiatalPharmacy AdministrationEndoscopy