| http://www.w3.org/ns/prov#value | - an introducer including a needle, the introducer defining an introducer lumen, and the introducer having sufficient rigidity to penetrate an annulus fibrosus of an intervertebral disc; and a catheter configured to be inserted through the introducer lumen and into the intervertebral disc, the catheter having a distal region including a bipolar radiofrequency electrode configuration, the distal regi
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