Pain MeasurementPainPain ManagementPain, PostoperativeChronic PainLow Back PainPain ThresholdBack PainLabial FrenumNeck PainAbdominal PainPain, IntractablePelvic PainPain PerceptionAnalgesicsFacial PainReproducibility of ResultsAcute PainNefopamPain, ReferredAnalgesiaTreatment OutcomeAnalgesics, OpioidShoulder PainArthralgiaProspective StudiesDouble-Blind MethodDisability EvaluationAnesthetics, LocalQuestionnairesMusculoskeletal PainSeverity of Illness IndexOsteoarthritis, KneeCryingAnalgesics, Non-NarcoticBupivacaineAnesthesia, CaudalLidocaineNeonatal NursingChronic DiseaseFibromyalgiaPsychometricsTime FactorsObserver VariationNociceptive PainAnesthesia, LocalNeuralgiaQuality of LifeFentanylConscious SedationFollow-Up StudiesMorphineOsteoarthritis, HipKnee Joint