Stomach UlcerPeptic UlcerPeptic Ulcer HemorrhageStomachDuodenal UlcerPeptic Ulcer PerforationLeg UlcerPressure UlcerHelicobacter pyloriSkin UlcerStomach NeoplasmsHelicobacter InfectionsAnti-Ulcer AgentsStomach DiseasesGastric MucosaGastritisBuruli UlcerHemostasis, EndoscopicDyspepsiaGastroscopyOmeprazoleGastric AcidGastric JuiceProton Pump InhibitorsHematemesisCimetidineEndoscopy, GastrointestinalHistamine H2 AntagonistsAnti-Inflammatory Agents, Non-SteroidalGastrointestinal HemorrhageMelenaVagotomy