1. Tianjin Key Laboratory of Biomaterial Research
2. Institute of Biomedical Engineering
3. Chinese Academy of Medical Sciences & Peking Union Medical College
4. Tianjin 300192
5. China
6. Department of Biomedical Engineering
7. University of Minnesota
8. Minneapolis
9. USA
10. The Key Laboratory of Bioactive Materials of Ministry of Education
11. Institute of Molecular Biology
12. College of Life Science
13. Nankai University
14. Tianjin