1 Joint Center for Regenerative Medicine Research of South China University of Technology and The University of Western Australia, School of Medicine, South China University of Technology, Guangzhou, China.
2 Shenzhen Key Laboratory of Musculoskeletal Tissue Reconstruction and Function Restoration, Department of Spine Surgery and Institute for Orthopaedic Research, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), Shenzhen, China.
3 Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, United States.