1. Key Laboratory of Advanced Technologies of Materials Ministry of Education School of Materials Science and Engineering Southwest Jiaotong University Chengdu 610031 China
2. Chengdu Neurotrans Medical Technology Co., Ltd. Chengdu 610095 China
3. National & Local Joint Engineering Research Centre of Orthopaedic Biomaterials Department of Bone & Joint Surgery Peking University Shenzhen Hospital Shenzhen 518036 China
4. Department of Neurosurgery, Union Hospital, Tongji Medical College Huazhong University of Science and Technology 1277 Jiefang Avenue Wuhan Hubei 430022 China