Abdominal PainStomachPainStomach NeoplasmsChronic PainPain ManagementAbdomen, AcutePain ThresholdPain, PostoperativePain MeasurementBack PainPain, IntractableStomach DiseasesLow Back PainNeck PainPelvic PainAcute PainPain PerceptionAppendicitisFacial PainGastrointestinal DiseasesStomach UlcerIrritable Bowel SyndromePain, ReferredGastric MucosaConstipationIleal DiseasesAbdomenShoulder PainTomography, X-Ray ComputedTorsion AbnormalityTreatment OutcomeMusculoskeletal PainColonic Diseases, FunctionalIntestinal ObstructionChronic DiseaseRadiography, AbdominalPancreatitisColitis, IschemicIntestinal PerforationVisceral PainAnalgesicsJejunal DiseasesIntussusceptionStomach VolvulusStomach RuptureCecal DiseasesEndoscopy, Digestive SystemColonic DiseasesRupture, SpontaneousEndoscopy, GastrointestinalLaparotomyDuodenumRetrospective StudiesVomitingNociceptive PainProspective StudiesNeuralgiaAcute DiseasePancreatitis, ChronicDiarrheaGastrointestinal MotilityAnalgesics, OpioidFlatulenceFatal OutcomeAppendixAppendectomyLaparoscopyHemoperitoneumFollow-Up StudiesPyloric AntrumDuodenal DiseasesTime FactorsMesenteric Vascular OcclusionRecurrenceColicHyperalgesiaDiverticulitisQuestionnairesCholecystitisIntestinal DiseasesDiagnostic ErrorsColonoscopyIntestine, SmallGastrectomyDefecationDouble-Blind MethodGastroscopyBezoarsHelicobacter pyloriGastritisGastrointestinal HemorrhagePeritonitis, TuberculousMesenteric LymphadenitisSeverity of Illness IndexMyofascial Pain SyndromesDigestive SystemArthralgiaDyspepsiaHymen