Pancreatic JuiceGastric JuiceIntrinsic FactorGastric MucosaTetragastrinPepsin ADuodenogastric RefluxGastric Acidity DeterminationPentagastrinGastric AcidStomachAnemia, PerniciousStomach UlcerDuodenal UlcerHydrogen-Ion ConcentrationStomach DiseasesSecretory RateCobalt IsotopesAchlorhydriaHelicobacter pyloriGastritisHydrochloric AcidHelicobacter InfectionsCitrus sinensisSucralfateDuodenitisNizatidineCitrus paradisiPneumonia, AspirationAnti-Ulcer AgentsPepstatinsPylorusPepsinogen AUlcerBile RefluxTracheal DiseasesHistamine H2 AntagonistsSalivaGastrinsGastric MucinsFood-Drug InteractionsDuodenumPyloric AntrumDuodenal DiseasesHistamineI Blood-Group SystemPeptic UlcerMetaplasia