GastroscopyMetaplasiaGastroscopesEsophagusEndoscopy, GastrointestinalStomach DiseasesAdenocarcinomaPrecancerous ConditionsDyspepsiaEsophagoscopyGenes, MCCStomach NeoplasmsGastroesophageal RefluxHypnosis, AnestheticGastritis, AtrophicStomach UlcerBiopsyHelicobacter pyloriHelicobacter InfectionsPharmacy AdministrationEndoscopes, GastrointestinalCardiaConscious SedationGastritisAntacidsEndoscopyHernia, HiatalStomachEsophagogastric JunctionGastrointestinal HemorrhagePepsinogen AMucous MembraneEsophagectomyGastric MucosaEndoscopy, Digestive SystemCapsule EndoscopyGastrectomyReferral and ConsultationEsophagitisGastrointestinal DiseasesChromosomes, Human, Pair 5Peptic UlcerDuodenal UlcerOutpatient Clinics, HospitalChromosomes, Human, Pair 17Anti-Ulcer AgentsWaiting ListsAbdominal PainColonoscopyFamily PracticePyloric AntrumLoss of HeterozygosityRetrospective StudiesAppointments and SchedulesGastrinsDisease ProgressionPatient SatisfactionBreath TestsImmunohistochemistryTumor Markers, BiologicalEsophageal NeoplasmsMedical Audit