Stomach DiseasesGastritis, HypertrophicHypertension, PortalHypoproteinemiaProtein-Losing EnteropathiesGastric MucosaEsophageal and Gastric VaricesAnti-Inflammatory Agents, Non-SteroidalGastrointestinal HemorrhageGastroscopyGastroparesisPolypsHypersplenismStomach UlcerStomachMisoprostolGastritisGastric EmptyingGastrointestinal DiseasesIndomethacinLiver CirrhosisAnti-Ulcer AgentsHelicobacter pyloriHelicobacter InfectionsRisk Factors