1. Back and macroscopic anatomy of the spinal cord;Williams,2005
2. The facet syndrome: myth or reality?;Jackson;Orthop Clin North Am,1992
3. Classification of age-related changes in lumbar intervertebral discs;Boos;Spine,2002
4. History and pathology of the human intervertebral disc;Roberts;J Bone Joint Surg Am,2006
5. Lumbar disc degeneration: epidemiology and genetics;Battie;J Bone Joint Surg Am,2006