AspirinPainPain ManagementPain MeasurementPain, PostoperativePain, IntractableChronic PainLow Back PainBack PainPain ThresholdAnalgesicsAnalgesics, OpioidAnti-Inflammatory Agents, Non-SteroidalAbdominal PainAnesthetics, LocalNeck PainLabor PainAnalgesiaTreatment OutcomeFacial PainPlatelet Aggregation InhibitorsAnalgesia, ObstetricalPelvic PainDouble-Blind MethodNerve BlockAcute PainBupivacaineAnalgesia, EpiduralRelief WorkPain PerceptionNeuralgiaMorphineShoulder PainAnalgesia, Patient-ControlledTrigeminal NeuralgiaInjections, EpiduralAnalgesics, Non-NarcoticPain, ReferredCeliac PlexusTramadolInjections, Intra-ArticularZygapophyseal JointChronic DiseaseProspective StudiesAcupuncture AnalgesiaRadiculopathyAcetaminophenHydromorphoneCyclooxygenase InhibitorsFentanylTranscutaneous Electric Nerve StimulationPalliative CareMeperidineMusculoskeletal PainArthralgiaFollow-Up StudiesTime FactorsInjections, SpinalTiclopidineElectric Stimulation TherapyVertebroplastyCausalgiaComplex Regional Pain SyndromesDrug Therapy, CombinationThromboxane B2IbuprofenLidocaineOpiumPlatelet AggregationKetorolacDiclofenacKetoprofenSalicylatesFractures, CompressionAnesthesia, EpiduralRetrospective StudiesDose-Response Relationship, DrugRange of Motion, ArticularAnesthesia, CaudalButorphanolAnesthesia, LocalSpinal FracturesPlatelet Function TestsNociceptive PainParesthesiaHyperalgesiaFluoroscopyRandomized Controlled Trials as TopicPatient SatisfactionOxycodoneCodeineFailed Back Surgery SyndromeSpinal NeoplasmsIntervertebral Disc DisplacementLabor, ObstetricOsteoarthritisLumbosacral RegionIntercostal NervesCyclooxygenase 2 InhibitorsQuestionnaires