1. Medical School of Chinese PLA, Chinese PLA General Hospital, Beijing 100853, China
2. Department of Orthopedics, the Fourth Medical Centre, Chinese PLA General Hospital, Beijing 100048, China
3. Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
4. National & Local Joint Engineering Laboratory for Synthetic Technology of High Performance Polymer, College of Chemistry, Jilin University, Changchun 130012, P. R. China
5. Ji Hua Laboratory, Foshan, Guangdong 528000, P. R. China