Relationship between paravertebral muscle degeneration and spinal-pelvic sagittal parameters in patients with lumbar disc herniation oleh Tianlian Bao, Chunmei Wang, Yongjiang Wang, Tiantian Wang, Qingxin Zhang, Feng Gao, Hao Liu, Xiaoyang Tao, Gang Gao, Tinxin Zhang, Wupeng Yang, Keyu Zhao