Breakthrough PainNociceptive PainPainAdministration, BuccalPain MeasurementAnalgesics, OpioidFentanylAnalgesicsLabor PainNeuralgiaPain ManagementPain ThresholdChronic PainNociceptorsPain, PostoperativeAnalgesia, EpiduralPain, IntractableDouble-Blind MethodPrescription Drug MisuseChronic DiseaseNeoplasmsArthralgiaTreatment OutcomeLow Back PainBack PainAbdominal PainMedication ErrorsNeck PainMedication AdherencePalliative CarePelvic PainQuestionnairesPain PerceptionFacial PainProspective StudiesAcute PainAnti-Inflammatory Agents, Non-SteroidalPain, ReferredTime FactorsRetrospective StudiesSeverity of Illness IndexRadionuclide GeneratorsQuality of LifeShoulder PainFollow-Up StudiesMusculoskeletal PainPatient SatisfactionComorbidityCohort StudiesMedication SystemsMedication ReconciliationMedication Systems, Hospital