GastritisHelicobacter pyloriHelicobacter InfectionsAdenocarcinomaHelicobacterGastritis, AtrophicGastric MucosaStomach NeoplasmsStomachUreasePyloric AntrumHelicobacter heilmanniiHelicobacter hepaticusMetaplasiaPeptic UlcerGastroscopyDyspepsiaStomach DiseasesPepsinogen AStomach UlcerAmoxicillinGastritis, HypertrophicClarithromycinAnti-Ulcer AgentsOmeprazoleMetronidazoleBacterial ProteinsAdenocarcinoma, MucinousAntigens, BacterialBiopsyEsophageal NeoplasmsGastrinsAchlorhydriaBarrett EsophagusLung NeoplasmsPancreatic NeoplasmsPrecancerous ConditionsPepsinogen CBismuthAdenocarcinoma, PapillaryCardiaDuodenitisCarcinoma, Pancreatic DuctalImmunohistochemistryAntibodies, BacterialEndoscopy, GastrointestinalAdenocarcinoma, Bronchiolo-AlveolarBile RefluxParietal Cells, Gastric2-PyridinylmethylsulfinylbenzimidazolesChronic DiseasePolymerase Chain ReactionBreath TestsPepsinogensAnti-Bacterial AgentsGastric JuiceLansoprazoleProton Pump InhibitorsGastric AcidEsophagogastric JunctionDrug Therapy, CombinationDNA, BacterialLewis Blood-Group SystemHelicobacter felisTumor Markers, BiologicalDuodenal UlcerEndoscopyGerbillinaeCampylobacterEndoscopy, Digestive SystemColonic NeoplasmsAnemia, PerniciousMolecular Sequence DataGastroesophageal RefluxAntacidsLymphoma, B-Cell, Marginal ZoneTinidazoleAcinonyxCell Line, TumorPrognosisCytotoxinsAtrophyNeoplasm StagingRanitidineGastric MucinsImmunoenzyme TechniquesUreaIntestinal NeoplasmsPostgastrectomy SyndromesGene Expression Regulation, NeoplasticGastrectomyGastrointestinal DiseasesDuodenogastric RefluxEsophagitisGastric Acidity DeterminationRisk FactorsCase-Control StudiesImmunoglobulin GGastric FundusKeratin-7