1. Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi’an 710032, China
2. Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY 11794-5281, USA
3. Regenerative Medicine, Institute of Health and Biomedical Innovation, Queensland University of Technology, Kelvin Grove, QLD 4059, Australia
4. National Tissue Engineering Center of China, Shanghai 200240, China