GastritisGastroesophageal RefluxHelicobacter pyloriHelicobacter InfectionsHelicobacterGastritis, AtrophicGram-Negative BacteriaGastric MucosaEsophagogastric JunctionEsophageal pH MonitoringStomachFundoplicationEsophagusGram-Negative Bacterial InfectionsGram-Positive BacteriaStomach NeoplasmsEsophagitisGastroscopyProton Pump InhibitorsUreaseAnti-Bacterial AgentsPyloric AntrumMetaplasiaManometryPeptic UlcerHelicobacter heilmanniiHernia, HiatalOmeprazoleHelicobacter hepaticusEsophagitis, PepticAnti-Ulcer AgentsDyspepsiaEndoscopy, Digestive SystemEndoscopy, GastrointestinalBarrett EsophagusEsophagoscopyEsophageal NeoplasmsBacterial ProteinsStomach DiseasesHeartburnEsophageal Sphincter, LowerBacteriaStomach UlcerLaryngopharyngeal Reflux2-PyridinylmethylsulfinylbenzimidazolesPepsinogen ALaryngitisAmoxicillinGastritis, HypertrophicMicrobial Sensitivity TestsClarithromycinBacterial InfectionsAntacidsMetronidazoleGram-Negative Anaerobic BacteriaLansoprazoleCardiaBile RefluxAntigens, BacterialGastric FundusGastric AcidGastric Acidity DeterminationGram-Negative Aerobic BacteriaBiopsyEndoscopyAchlorhydriaPhytochemicalsHistamine H2 AntagonistsDNA, BacterialGastrinsAdenocarcinomaBacteremiaBacteriological TechniquesEsophageal DiseasesGastric JuiceBismuthChronic DiseasePepsinogen CAnti-Infective AgentsDuodenitisHydrogen-Ion ConcentrationPlant ExtractsDuodenogastric RefluxAntibodies, BacterialRNA, Ribosomal, 16SProspective StudiesEsophageal Motility DisordersDeglutition DisordersPneumonia, AspirationRanitidineParietal Cells, GastricPrecancerous ConditionsGastric EmptyingGastrointestinal DiseasesMolecular Sequence DataRetrospective StudiesRabeprazoleBreath TestsTechnetium Tc 99m Sulfur ColloidGangrene