1. School of Medicine, Southeast University, 210009 Nanjing, China
2. Department of Integrative Medical Biology, Anatomy, Umeå University, SE-901 87 Umeå, Sweden
3. Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, 210096 Nanjing, China
4. China Orthopedic Regenerative Medicine Group (CORMed), China