Biological comparison between in vitro cultured degenerative and normal nucleus pulposus cells: When is the best time to intervene degenerative nucleus pulposus cells?
Liang Wei-guo, Ye Dong-ping, Dai Li-bing, Shen Yan
Chinese Journal of Tissue Engineering Research . 2010, (28): 5155 -5158 .  DOI: 10.3969/j.issn.1673-8225.2010.28.006