EndoscopyEndoscopy, GastrointestinalCapsule EndoscopyEndoscopy, Digestive SystemGastroscopyEndoscopes, GastrointestinalGastrointestinal HemorrhageEndoscopesEsophagoscopyCapsule EndoscopesColonoscopyDuodenoscopyEsophageal DiseasesGastrointestinal DiseasesUpper Gastrointestinal TractGastroenterologyDyspepsiaMelenaHemostasis, EndoscopicStomach DiseasesFiber Optic TechnologyHelicobacter InfectionsHelicobacter pyloriEsophagitisBarrett EsophagusNarrow Band ImagingPeptic Ulcer HemorrhageEsophagusDuodenal UlcerHematemesisPeptic UlcerGastroesophageal RefluxIntestinal DiseasesConscious SedationStomach UlcerDouble-Balloon EnteroscopyEsophageal and Gastric VaricesBiopsyGastritisEsophagitis, PepticIntestine, SmallJejunal DiseasesColonoscopesStomach NeoplasmsDuodenumHernia, HiatalGastric MucosaSigmoidoscopyOmeprazoleAnti-Ulcer AgentsStomachColonic PolypsCapsulesProspective StudiesBarium SulfateAngiodysplasiaPolypsMetaplasiaRetrospective StudiesGastroscopesGastrointestinal NeoplasmsColonic DiseasesEsophageal NeoplasmsUlcerDeglutition DisordersDuodenal NeoplasmsDuodenitisForeign BodiesProton Pump InhibitorsCholangiopancreatography, Endoscopic RetrogradeEsophageal StenosisTreatment OutcomePyloric AntrumSensitivity and SpecificityAbdominal PainJejunal NeoplasmsGastritis, AtrophicEndosonographyEosinophilic EsophagitisCatharticsPrecancerous ConditionsAntacidsEquipment DesignHeartburnCardia2-PyridinylmethylsulfinylbenzimidazolesIntestinal PolypsEnemaPredictive Value of TestsCausticsOptical FibersBruneiArgon Plasma CoagulationOccult BloodDuodenoscopesMidazolamHypertension, PortalGastric Antral Vascular EctasiaEsophageal pH MonitoringIntestinal Mucosa