Chronic PainPainPain ClinicsAnalgesics, OpioidPain MeasurementChronic DiseaseOpioid-Related DisordersCarisoprodolPain ManagementCatastrophizationPain, IntractableDrug IncompatibilityHydrocodoneSubstance Abuse DetectionOxycodoneFibromyalgiaAnalgesicsUrinalysisLow Back PainDrug MonitoringQuestionnairesPain ThresholdBack PainFacial PainDisability EvaluationMusculoskeletal PainAdaptation, PsychologicalNeck PainNeuralgiaChest PainDepressionPain, ReferredPain, PostoperativePain PerceptionAcute PainPelvic PainHyperalgesiaHydromorphoneAbdominal PainTemporomandibular Joint DisordersTreatment OutcomeSensitivity and SpecificityReproducibility of ResultsProspective StudiesShoulder PainRetrospective StudiesTime FactorsPredictive Value of TestsDelayed DiagnosisSeverity of Illness IndexAnalgesiaFollow-Up StudiesIntervertebral Disc DisplacementNociceptorsEarly DiagnosisPrenatal DiagnosisMorphineNociceptive PainAnxietyActivities of Daily LivingQuality of LifeComplex Regional Pain SyndromesRisk FactorsPsychometricsManipulation, SpinalPrevalenceCross-Sectional StudiesStreet DrugsMagnetic Resonance ImagingAcute DiseaseCohort StudiesArthralgiaTomography, X-Ray ComputedPhysical Therapy ModalitiesEmergency Service, HospitalAbsenteeismMyofascial Pain SyndromesPrimary Health CarePhysical StimulationDisabled PersonsAnalysis of VariancePatellofemoral Pain SyndromeDiagnosisPrognosisSingle-Blind MethodRisk AssessmentCentral Nervous System SensitizationStress, PsychologicalDouble-Blind MethodClinical ProtocolsChi-Square DistributionFearNociceptionSpinal CordInjections, SpinalROC CurveSick LeaveSex FactorsUnited StatesTriage