Pain ThresholdPainPain MeasurementPain ManagementPain PerceptionEar, ExternalHot TemperatureDiffuse Noxious Inhibitory ControlHyperalgesiaAnalgesiaAnalgesics, OpioidAnalgesicsAnalgesics, Non-NarcoticCold TemperaturePressureAlfentanilWristTranscutaneous Electric Nerve StimulationPentazocinePhysical StimulationFibromyalgiaChronic PainSensory ThresholdsElectric Stimulation TherapyCatechol O-MethyltransferasePain, PostoperativeDouble-Blind MethodBack PainLow Back PainCross-Over StudiesAbdominal PainSex CharacteristicsMorphinePain, IntractableNeck PainCapsaicinElectric StimulationPelvic PainFacial PainTime FactorsAcute PainPain, ReferredSkinShoulder PainMusculoskeletal PainModels, BiologicalTreatment OutcomeQuestionnairesNeuralgiaNociceptive PainRetrospective StudiesChronic DiseaseFollow-Up StudiesMyofascial Pain SyndromesComplex Regional Pain SyndromesVisceral PainProspective StudiesLabor PainArthralgiaClinical CompetenceQualitative ResearchAdaptation, PsychologicalSeverity of Illness IndexQuality of LifeNociceptorsPostoperative ComplicationsInterviews as TopicDisability EvaluationStress, PsychologicalUnited StatesRisk FactorsAnesthetics, LocalCross-Sectional StudiesAttitude of Health PersonnelCatastrophizationAttitude to HealthFlank PainPatient SatisfactionAnalysis of VarianceMagnetic Resonance ImagingPilot ProjectsAge FactorsAnxietyEye PainPerceptionReproducibility of ResultsFocus GroupsPrevalenceEmotionsPalliative CarePhantom LimbCohort StudiesPhysical Therapy ModalitiesHealth Knowledge, Attitudes, PracticeTomography, X-Ray ComputedLaparoscopySex FactorsLearningToothacheInjections, Spinal