MetaplasiaBarrett EsophagusPrecancerous ConditionsGastric MucosaGastritisGastritis, AtrophicGoblet CellsStomach NeoplasmsEsophagusPrimary MyelofibrosisHelicobacter InfectionsStomachHelicobacter pyloriCardiaMucinsDuodenitisMucin 5ACIntestinesEsophagoscopyOssification, HeterotopicMucous MembraneGastroscopyBiopsyMucin-2AdenocarcinomaMucin-6Pyloric AntrumChief Cells, GastricEsophageal NeoplasmsEsophagogastric JunctionEpitheliumMucusImmunohistochemistryGastroesophageal RefluxGastric MucinsDuodenumStomach DiseasesStomach UlcerKeratin-7HyperplasiaRespiratory MucosaKeratin-20Apocrine GlandsHelicobacter felisDuodenal UlcerEndoscopy, GastrointestinalBile RefluxKeratinsBronchi