Foot BonesPainPain ManagementPain MeasurementChronic PainPain ThresholdPain, PostoperativeBack PainLow Back PainAbdominal PainPain, IntractableNeck PainPain PerceptionPelvic PainFacial PainAcute PainPain, ReferredShoulder PainMusculoskeletal PainTreatment OutcomeAnalgesicsQuestionnairesNeuralgiaNociceptive PainRetrospective StudiesChronic DiseaseAnalgesics, OpioidTime FactorsFollow-Up StudiesHyperalgesiaMyofascial Pain SyndromesComplex Regional Pain SyndromesVisceral PainProspective StudiesLabor PainArthralgiaAnalgesiaClinical CompetenceQualitative ResearchAdaptation, PsychologicalSeverity of Illness IndexQuality of LifeNociceptors