1 Division of Spine Surgery, Department of Orthopedic Surgery, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, China.
2 Department of Polymer Science and Engineering, Key Laboratory of High-Performance Polymer Materials and Technology of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
3 Institute of Brain Science and Disease, School of Basic Medicine, Qingdao University, Qingdao, Shandong, 266001, China.