Interleukin-21 Is Associated with the Pathogenesis of Lumbar Disc Herniation - Xue, Huawei; Yao, Yu; Wang, Xiaoying; Zhang, Feng; Jiang, Xingjie; Liu, Jinbao; Wang, Hua; Li, Yuqian; Wang, Xiaodong; Li, Hongbin; Zhang, Jianhua (Iranian Journal of Allergy, Asthma and Immunology, 2015)