1. Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China
2. Department of Maxillofacial Biomedical Engineering, School of Dentistry, Kyung Hee University, Seoul 130-701, Republic of Korea
3. Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
4. Department of Biomedical Materials and Engineering, Hokkaido University, Sapporo 060-8586, Japan