1. Department of Orthopaedic Surgery Zhongshan Hospital Fudan University Shanghai 200032 China
2. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Chemistry and Chemical Engineering Donghua University Shanghai 201620 China
3. Department of Orthopedics Surgery Minhang Hospital Fudan University Shanghai 201100 China
4. Department of Orthopaedic Surgery Shanghai Baoshan District Wusong Center Hospital Fudan University Shanghai 200940 China