1. School of Medicine, Southeast University, 210009 Nanjing, China
2. Center for Stem Cell and Regenerative Medicine, Southeast University, 210009 Nanjing, China
3. Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, 210096 Nanjing, China
4. China Orthopedic Regenerative Medicine Group (CORMed), Hangzhou 310058, China
5. Department of Integrative Medical Biology, Anatomy, Umeå University, SE-901 87 Umeå, Sweden
6. Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, SE-901 87 Umeå, Sweden