1. Research Institute of Tissue Engineering and Stem Cells, Department of Orthopaedics, Nanchong Central Hospital, The Second Clinical College of North Sichuan Medical College, Nanchong, Sichuan 637000, China
2. Key Laboratory of Advanced Technologies of Materials (MOE), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
3. Sichuan Provincial Laboratory of Orthopaedic Engineering, Department of Orthopaedics, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, China