Relief WorkTreatment OutcomePain MeasurementPainSymptom AssessmentDepressionQuestionnairesSeverity of Illness IndexFollow-Up StudiesPain ManagementProspective StudiesPain, IntractableBehavioral SymptomsTime FactorsQuality of LifePsychiatric Status Rating ScalesPain, PostoperativePalliative CareRetrospective StudiesAnxietyChronic DiseasePrevalenceAffective SymptomsAnalgesicsRisk FactorsAnalgesics, OpioidAnesthetics, LocalCross-Sectional StudiesDepressive DisorderAsthmaFatigueHeartburnStress Disorders, Post-TraumaticLongitudinal StudiesNerve BlockIrritable Bowel SyndromeHeadacheCoughStress, PsychologicalDouble-Blind MethodDyspneaGastrointestinal DiseasesAnalgesiaAnalgesia, ObstetricalRespiration DisordersDyspepsiaTrigeminal NeuralgiaBack PainSchizophreniaLower Urinary Tract SymptomsConstipationBupivacaineLabor PainHot FlashesMagnetic Resonance ImagingOccupational DiseasesGastroesophageal RefluxPsychometricsParesthesiaAcute DiseaseAge FactorsSchizophrenic PsychologyRecurrenceRadiculopathyComorbidityPsychotic DisordersPostoperative ComplicationsCohort StudiesAnalgesia, EpiduralUrination DisordersInjections, EpiduralRespiratory Tract DiseasesSex FactorsArthralgiaPruritusZygapophyseal JointAnalysis of VarianceDisastersLow Back PainPlacebosPsychophysiologic DisordersPelvic PainInjections, Intra-ArticularRespiratory SoundsElectric Stimulation TherapyAdaptation, PsychologicalPersonality InventoryProdromal SymptomsPremenstrual SyndromeSyndromeRandomized Controlled Trials as TopicDecompression, SurgicalAffectLogistic ModelsUnited StatesAcupuncture TherapyNeuralgiaMigraine DisordersChronic PainAnalgesics, Non-Narcotic