Abdominal PainPainChronic PainPain ManagementAbdomen, AcutePain ThresholdPain, PostoperativePain MeasurementBack PainLow Back PainPain, IntractableNeck PainPelvic PainAcute PainPain PerceptionAppendicitisFacial PainIrritable Bowel SyndromeGastrointestinal DiseasesPain, ReferredMedical History TakingConstipationIleal DiseasesTomography, X-Ray ComputedTreatment OutcomeShoulder PainAbdomenTorsion AbnormalityMusculoskeletal PainColonic Diseases, FunctionalChronic DiseaseIntestinal ObstructionRadiography, AbdominalPancreatitisColitis, IschemicProspective StudiesRetrospective StudiesIntestinal PerforationAnalgesicsVisceral PainHistory, 20th CenturyCecal DiseasesIntussusceptionFollow-Up StudiesJejunal DiseasesRupture, SpontaneousRisk FactorsQuestionnairesColonic DiseasesAcute DiseaseRecurrenceLaparotomyHistory, 19th CenturyNeuralgiaNociceptive PainPancreatitis, ChronicAnalgesics, OpioidDiarrheaAppendectomyFlatulenceVomitingEndoscopy, Digestive SystemHemoperitoneumAppendixFatal OutcomeSeverity of Illness IndexTime FactorsDiagnostic ErrorsMesenteric Vascular OcclusionColicLaparoscopyDiverticulitisColonoscopyHistory of MedicineHistory, 17th CenturyHyperalgesiaCholecystitisHistory, 18th CenturyPrevalenceEndoscopy, GastrointestinalDefecationDouble-Blind MethodPeritonitis, TuberculousDuodenal DiseasesHeadacheArthralgiaMesenteric LymphadenitisIntestinal DiseasesMyofascial Pain SyndromesHymenPhysical ExaminationComplex Regional Pain SyndromesHistory, AncientFlank PainHematocolposMesenteric Artery, SuperiorPeritoneal DiseasesPurpura, Schoenlein-HenochHistory, 21st CenturyHistory