Hashemi 2014.

Methods	Randomised controlled trial
Participants	Inclusion criteria Spondylolisthesis grade I in MRI at 1 single level Chronic low back pain > 6 months Supravertebral facet tenderness Pain in hyperextension Minimum NRS score of 4 Positive diagnostic medial branch block test Exclusion criteria Radicular pain Neurological deficit Indication for surgery Stenosis of spinal canal Spondylolysis Positive straight leg raising test Suppressed reflex Known psychiatric disease Spinal deformity Neoplastic or infectious disease
Interventions	Group 1: pulsed RF using a 22 G cannula SMK C10 with method described by van Kleef et al applied for a duration of 120 s with 45 V with silent time 480 ms Group 2: steroid injections (1 mL (40 mg) triamcinolone) and 0.5 mL bupivacaine 0.5%
Outcomes	Primary outcome: decrease in NRS score > 50% and pain relief defined as up to 6 months Secondary outcome: improvement in functional status (ODI)
Notes