1. George W. Woodruff School of Mechanical Engineering, Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia.
2. School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts.
3. Wyss Institute for Biologically Inspired Engineering, Cambridge, Massachusetts.
4. Division of Physical Therapy, Georgia State University, Atlanta, Georgia.
5. School of Applied Physiology, Georgia Institute of Technology, Atlanta, Georgia.