1. Spine-Health. Spinal Fusion Surgery Worth the Cost for Stenosis Pateints? 2009. http://www.spine-health.com/blog/spinal-fusion-surgery-worth-cost-stenosis-patients. Accessed 2015.
2. Adams MA, Hutton WC. The effect of posture on the lumbar spine. J Bone Joint Surg Br. 1985;67(4):625–9.
3. Pattappa G, et al. Diversity of intervertebral disc cells: phenotype and function. J Anat. 2012;221(6):480–96.
4. Mwale F. Distinction between the extracellular matrix of the nucleus pulposus and hyaline cartliage: a requisite for tissue engineering of intervertebral disc. Eur Cell Mater. 2004;8:6
5. Khan SN, Stirling AJ. Controversial topics in surgery: degenerative disc disease: disc replacement. Against. Ann R Coll Surg Engl. 2007;89(1):6–11.