Focal Microvibration and Chronic Lumbosacral Radicular Pain

Four devices will be attached to the skin according the indication of the investigators for 6 hours/day every day except Thursday and Sunday

Four devices similar to the active one but not able to deliver the microvibration will be applied to the patients

Patients will be treated with drugs (gabapentinoids, Serotonin-norepinephrine reuptake inhibitor, tricyclic antidepressants, opioids) according to guidelines.