1. Research Centre for Human Tissues and Organs Degeneration; Shenzhen Institute of Advanced Technology, Chinese Academy of Science; Shenzhen 518055 China
2. School of Materials Science and Engineering; South China University of Technology; Guangzhou China
3. Department of Orthopaedics; University of California at Davis; Sacramento California USA
4. Department of Orthopaedics and Traumatology; Li Ka Shing Faculty of Medicine, The University of Hong Kong; Hong Kong
5. Department of Orthopaedic Surgery; West China Hospital; State Key Laboratory of Oral Diseases, Sichuan University; Chengdu China