A comparison between the low back pain scales for patients with lumbar disc herniation: validity, reliability, and responsiveness oleh Min Yao, Bao-ping Xu, Zhen-jun Li, Sen Zhu, Zi-rui Tian, De-hua Li, Jue Cen, Shao-dan Cheng, Yong-jun Wang, Yan-ming Guo, Xue-jun Cui