1. Knee Surgery Department of the Institute of Sports MedicineBeijing Key Laboratory of Sports InjuriesPeking University Third Hospital Beijing 100191 China
2. Department of Joint Surgery and Sports MedicineZhongshan HospitalXiamen University Xiamen Fujian 361000 China
3. Department of OrthopedicsSun Yat‐sen Memorial HospitalSun Yat‐sen University Guangzhou 510120 China
4. Department of ChemistryUniversity of California Riverside Riverside CA 92521 USA
5. Center for NanomedicineBrigham and Women's HospitalHarvard Medical School Boston MA 02115 USA
6. Beijing National Laboratory for Molecular SciencesState Key Laboratory of Polymer Physics and ChemistryInstitute of Chemistry Chinese Academy of Sciences Beijing 100190 China