Kim, David Daewhan Conversion of Intrathecal Opioids to Fentanyl in Chronic Pain Patients With Implantable Pain Pumps: A Retrospective Study. [electronic resource] - Neuromodulation : journal of the International Neuromodulation Society Oct 2019 - 823-827 p. digital Publication Type: Journal Article ISSN: 1525-1403 Standard No.: 10.1111/ner.12936 doi Subjects--Topical Terms: AgedAnalgesics, Opioid--administration & dosageChronic Pain--diagnosisDrug Substitution--methodsFemaleFentanyl--administration & dosageHumansInfusion Pumps, Implantable--trendsInjections, Spinal--methodsMaleMiddle AgedMorphine--administration & dosageRetrospective Studies