Pain MeasurementPainPain ManagementChronic PainShigella sonneiPain, IntractablePain ThresholdPain, PostoperativeLow Back PainBack PainNeck PainAbdominal PainFibromyalgiaAnalgesics, OpioidPelvic PainPain PerceptionHost Factor 1 ProteinFacial PainQuality of LifeAcute PainPain, ReferredPalliative CareReproducibility of ResultsChronic DiseaseTreatment OutcomeQuestionnairesShoulder PainMusculoskeletal PainBone NeoplasmsSeverity of Illness IndexDouble-Blind MethodProspective StudiesAnalgesicsNeoplasmsNociceptive PainNeuralgia