1. Division of Surgery & Interventional Science, Royal National Orthopaedic Hospital, University College London, Stanmore HA7 4LP, U.K.
2. Centre for the Cellular Microenvironment, University of Glasgow, Glasgow G12 8LT, U.K.
3. Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China
4. Beijing Key Laboratory of Advanced Manufacturing Technology, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
5. Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
6. London Centre for Nanotechnology, University College London, London WC1H 0AH, U.K.
7. Institute of Bioengineering, College of Chemical and Biological Engineering, Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310027, China