Magnetic resonance imaging evaluation of the relationship between the lumbosacral spine saggital morphology and intervertebral disc degeneration 
Liu Jin-rui, Yang Qing-guo, Duan Wen, Bo Ran, Zhang Yin-shun
Chinese Journal of Tissue Engineering Research . 2012, (17): 3139 -3142 .  DOI: 10.3969/j.issn.1673-8225.2012.17.023