MetaplasiaGastritis, AtrophicAtrophyGastric MucosaHelicobacter pyloriStomach NeoplasmsHelicobacter InfectionsGastritisPrecancerous ConditionsPepsinogen ABarrett EsophagusPepsinogen CCardiaStomachPepsinogensGastroscopyIntestinesEsophagusEsophagoscopyMucin-2Esophagogastric JunctionGastrinsMucin-6AdenocarcinomaPyloric AntrumBiopsyMuscular AtrophyKeratin-7Esophageal NeoplasmsMucinsHelicobacter felisDuodenal UlcerGastroesophageal RefluxStomach UlcerStomach DiseasesMucous MembraneParietal Cells, GastricKeratin-20Endoscopy, GastrointestinalMucin 5ACGoblet CellsBile RefluxProtein Tyrosine Phosphatase, Non-Receptor Type 11Intestinal NeoplasmsOptic AtrophyImmunohistochemistryRisk FactorsMuscular Atrophy, SpinalCase-Control StudiesDyspepsiaGastric FundusJapanMultiple System AtrophyIntestinal MucosaPacific StatesIntestinal DiseasesEndoscopyDisease ProgressionHomeodomain ProteinsChief Cells, GastricEsophagitisEsophageal DiseasesAntibodies, BacterialCell Transformation, NeoplasticSpinal Muscular Atrophies of ChildhoodGastric JuiceCystitisEndoscopy, Digestive SystemChronic DiseasePolymorphism, GeneticTumor Markers, BiologicalPrimary MyelofibrosisPortugalHistocytochemistryColombiaEpitheliumGenetic Predisposition to DiseaseOlivopontocerebellar AtrophiesMucin-1Narrow Band ImagingFollow-Up StudiesPeptic UlcerGyrate AtrophyHernia, HiatalGastrointestinal NeoplasmsAsian Continental Ancestry GroupKeratinsProspective StudiesDuodenitisManometryKi-67 AntigenImmunoenzyme TechniquesSucrasePolymorphism, Single NucleotideGerbillinaeOmeprazoleStaining and LabelingLouisianaMethylene BlueTumor Suppressor Protein p53