1. Frontier
Institute of Science and Technology, and State Key Laboratory for
Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
2. Department
of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
3. Department
of Biologic and Materials Sciences, University of Michigan, Ann Arbor, Michigan 48109, United States
4. Macromolecular
Science and Engineering Center, University of Michigan, Ann Arbor, Michigan 48109, United States
5. Department
of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States