1. Department of Bioengineering, University of Pennsylvania, 210 S 33rd St, Philadelphia, Pennsylvania 19104, United States
2. McKay Orthopedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, United States
3. Center for Engineering Mechanobiology, University of Pennsylvania, Philadelphia, Pennsylvania, United States
4. Institute for Medicine and Engineering, Department of Physiology, University of Pennsylvania, 3340 Smith Walk, Philadelphia, Pennsylvania 19104, United States