1Macnab I. Negative disc exploration:an analysis of the causes of nerye root involveme in sixty-eight patients. J Bone Joint Surg(Am), 1971, 53 : 891 893.
2Kapural L, Mekhail N, Hicks D, et al. Histologi- cal changes and temperature distribution studies of a novel bipolar radiofrequency heating system in degenerated and nondegenerated human cadaver lumbar discs. Pain Med, 2008, 9 : 68 - 75.
3Schaufele MK. Single level lumbar disc hemia- tions resulting in radicular pain: pain and func- tional outcomes after treatment with targeted disc decompression. Pain Med, 2008, 9 : 835 - 843.