1. Institute of Sports Medicine Beijing Key Laboratory of Sports Injuries Peking University Third Hospital Beijing 100191 P. R. China
2. State Key Laboratory of Organic‐Inorganic Composites Beijing Laboratory of Biomedical Materials Beijing University of Chemical Technology Beijing 100029 P. R. China
3. MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 P. R. China