Analgesics, OpioidChronic PainOpioid-Related DisordersPainPain ClinicsOxycodonePain, IntractableKentuckyUrinalysisPain MeasurementChronic DiseaseRetrospective StudiesUnited StatesAnalgesicsPain ManagementPhysician's Practice PatternsPain ThresholdPain, PostoperativeUnited States Environmental Protection AgencyLow Back PainBack PainDose-Response Relationship, DrugTreatment OutcomeNeoplasmsAbdominal PainNeck PainPelvic PainPain PerceptionFacial PainMaximum Allowable ConcentrationAcute PainSurvivorsPain, ReferredScandinaviaShoulder PainMedicareMusculoskeletal PainRisk AssessmentSEER Program