RT Journal Article SR Electronic T1 Long-term pain relief following percutaneous steroid treatment of spinal synovial cysts: a population-based cohort study JF Journal of NeuroInterventional Surgery JO J NeuroIntervent Surg FD BMJ Publishing Group Ltd. SP 836 OP 836 DO 10.1136/neurintsurg-2020-016322 VO 12 IS 9 A1 J Levi Chazen YR 2020 UL http://jnis.bmj.com/content/12/9/836.abstract AB