Breakthrough PainAdministration, BuccalPainAnalgesics, OpioidFentanylLabor PainPain MeasurementPain ManagementAnalgesicsChronic PainPain, PostoperativeAnalgesia, EpiduralPain, IntractableDouble-Blind MethodPrescription Drug MisuseChronic DiseasePain ThresholdNeoplasmsArthralgiaLow Back PainBack PainTreatment OutcomeNeuralgiaAbdominal 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 SatisfactionComorbidityMedication SystemsMedication ReconciliationCohort StudiesMedication Systems, HospitalGene Dosage