Peptic UlcerPeptic Ulcer HemorrhagePeptic Ulcer PerforationStomach UlcerDuodenal UlcerHelicobacter pyloriHelicobacter InfectionsLeg UlcerPressure UlcerSkin UlcerAnti-Ulcer AgentsGastritisHemostasis, EndoscopicDyspepsiaOmeprazoleProton Pump InhibitorsGastroscopyEndoscopy, GastrointestinalHematemesisGastric MucosaMelenaHistamine H2 AntagonistsBuruli UlcerAnti-Inflammatory Agents, Non-SteroidalGastrointestinal HemorrhageCimetidineAmoxicillinGastric AcidRanitidineClarithromycin2-PyridinylmethylsulfinylbenzimidazolesAntacidsStomachGastric JuiceDuodenoscopyEndoscopyMetronidazoleLansoprazoleVagotomyDuodenitisGastrointestinal DiseasesVagotomy, Proximal GastricRecurrenceStomach NeoplasmsGastroenterostomyElectrocoagulationStomach DiseasesEndoscopy, Digestive SystemBismuthPylorusDrug Therapy, CombinationFurazolidoneEsophagitisPyloric AntrumAntigens, BacterialTinidazoleUpper Gastrointestinal TractGastrinsAnti-Bacterial AgentsUreaseDiabetic FootGastrectomyDuodenumGastric Outlet ObstructionTreatment OutcomeTetragastrinGastric FistulaBreath TestsBacterial ProteinsRisk FactorsProspective StudiesPepsinogensZollinger-Ellison SyndromeAspirinEsomeprazoleDumping SyndromePolandGastritis, AtrophicDuodenal DiseasesMycobacterium ulceransCytotoxinsRabeprazolePrevalenceBiopsyGastric Acidity DeterminationOrganometallic CompoundsAge FactorsTime FactorsBandagesFamotidinePostgastrectomy SyndromesCampylobacterGastroenterologyEsophageal DiseasesIncidenceAntitrichomonal AgentsTetracyclineFollow-Up StudiesSmokingGastroesophageal Reflux