Esophageal pH MonitoringManometryGastroesophageal RefluxEsophagusGastric Acidity DeterminationHydrogen-Ion ConcentrationProton Pump InhibitorsEsophagoscopyCapsule EndoscopyMonitoring, AmbulatoryEsophageal Motility DisordersMonitoring, PhysiologicGastric AcidSphincter of OddiPeristalsisGastric JuiceDeglutitionAntacidsStomachRanitidineFamotidineAnti-Ulcer AgentsAnal CanalOmeprazoleDuodenogastric RefluxEsophageal AchalasiaTechnetium Tc 99m Disofenin2-PyridinylmethylsulfinylbenzimidazolesPressureEsophageal Spasm, DiffuseEsophageal Sphincter, LowerEsophageal Sphincter, UpperHistamine H2 AntagonistsEsophagogastric JunctionGastrointestinal MotilityDeglutition DisordersEsophageal DiseasesCommon Bile Duct DiseasesMagnesium HydroxideGastric EmptyingLansoprazoleFecal IncontinenceDiagnostic Techniques, Digestive SystemImino AcidsGastrinsGastric MucosaPneumonia, AspirationCimetidineGastrointestinal ContentsConstipationPostprandial PeriodCross-Over StudiesRabeprazoleDefecationDuodenumRectum