Peptic UlcerHelicobacter pyloriHelicobacter InfectionsPeptic Ulcer HemorrhageGastritisPeptic Ulcer PerforationStomach UlcerDuodenal UlcerGastric MucosaStomach NeoplasmsAnti-Ulcer AgentsLeg UlcerDyspepsiaPressure UlcerSkin UlcerOmeprazoleHemostasis, EndoscopicGastroscopyAmoxicillinClarithromycinStomachProton Pump InhibitorsMetronidazoleUreasePylorusEndoscopy, GastrointestinalStomach DiseasesHematemesisHistamine H2 AntagonistsRanitidineGastric AcidAnti-Inflammatory Agents, Non-SteroidalLansoprazolePyloric AntrumAntacidsBismuthMelenaBacterial ProteinsBuruli UlcerGastric JuiceDuodenitisGastrointestinal HemorrhageCimetidineEndoscopyAnti-Bacterial AgentsDrug Therapy, CombinationBreath TestsDuodenoscopyGastritis, AtrophicGastrointestinal Diseases2-PyridinylmethylsulfinylbenzimidazolesFurazolidoneTinidazoleEndoscopy, Digestive SystemRecurrenceVagotomyGastrinsVagotomy, Proximal GastricAntibodies, BacterialGastroenterostomyEsophagitisElectrocoagulationBiopsyPepsinogensDuodenumLewis Blood-Group SystemCytotoxinsUpper Gastrointestinal TractTreatment OutcomeCampylobacterProspective StudiesPepsinogen AOrganometallic CompoundsAntigens, BacterialGastrectomyPrevalenceTetracyclineGastric Outlet ObstructionAntitrichomonal AgentsDiabetic FootEsomeprazoleTetragastrinUreaPolymerase Chain ReactionGastric Acidity DeterminationDuodenal DiseasesGastric FistulaMetaplasiaGastroesophageal RefluxAspirinHelicobacterRisk FactorsZollinger-Ellison SyndromeVirulenceDNA, BacterialTime FactorsPolandSulfoxidesAge FactorsDumping Syndrome