1. Integrated Biosystems and Biomechanics Laboratory, University of Michigan, Ann Arbor, Michigan 48109, United States
2. Department of Mechanical 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. Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, People's Republic of China
5. Department of Biomedical Engineering, Yale University, New Haven, Connecticut 06511, United States
6. Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States