i II. Suguro T, Okazima Y. Motegi M, Okada Y, Kakiuchi T. 1996. Inflammatory cytokines in the herniated disc of the lumbar spine. Spine 21:218-24. Takebayashi T. Cavanaugh DA, Cftneyt O, Kallakuri S, Chen C. 2001. Effect of nucleus pulposus on the neural activity of dorsal root ganglion. Spine 26.940-4. Turk DC, Gatchel