1. Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
2. NSF Science and Technology Center for Engineering Mechanobiology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
3. Department of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
4. Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States