Chronic PainPainPain ClinicsAnalgesics, OpioidPain MeasurementChronic DiseaseOpioid-Related DisordersCarisoprodolPain ManagementCatastrophizationPain, IntractableDrug IncompatibilityHydrocodoneSubstance Abuse DetectionOxycodoneFibromyalgiaAnalgesicsUrinalysisLow Back PainDrug MonitoringPain ThresholdQuestionnairesBack PainFacial PainDisability EvaluationMusculoskeletal PainAdaptation, PsychologicalNeck PainNeuralgiaChest PainDepressionPain, ReferredPain, PostoperativePain PerceptionAcute PainPelvic PainHyperalgesiaHydromorphoneAbdominal PainTreatment OutcomeTemporomandibular Joint DisordersShoulder PainProspective StudiesAnalgesiaTime FactorsMorphineNociceptorsNociceptive PainIntervertebral Disc DisplacementReproducibility of ResultsSeverity of Illness IndexActivities of Daily LivingComplex Regional Pain SyndromesAnxietyQuality of LifeFollow-Up StudiesManipulation, SpinalStreet DrugsRetrospective StudiesPsychometricsDouble-Blind MethodDrug Administration ScheduleArthralgiaPhysical Therapy ModalitiesPredictive Value of TestsPhysical StimulationAbsenteeismMyofascial Pain SyndromesCross-Sectional StudiesPatellofemoral Pain SyndromeAnalysis of VarianceDisabled PersonsAcute DiseaseSingle-Blind MethodRisk FactorsEmergency Service, HospitalCentral Nervous System SensitizationCohort StudiesPrevalenceInjections, SpinalClinical ProtocolsDrug Therapy, CombinationPrimary Health CareNociceptionStress, PsychologicalFearSpinal CordSick LeaveAntineoplastic Combined Chemotherapy ProtocolsAnalgesics, Non-NarcoticTriageAnesthetics, LocalRisk AssessmentExercise TherapyHernia, InguinalSensitivity and SpecificityChi-Square DistributionLumbar VertebraeCross-Over StudiesMagnetic Resonance Imaging