The role of melatonergic system in intervertebral disc degeneration and its association with low back pain: a clinical study oleh Chong Chen, Zongyuan Deng, Zhengran Yu, Yifan Chen, Tao Yu, Changxiang Liang, Yongyu Ye, Yongxiong Huang, Feng-Juan Lyu, Guoyan Liang, Yunbing Chang