1. Department of Bioengineering, Northeastern University, Boston, MA, USA
2. Departments of Biology, Electrical and Computer Engineering, and Physics, Northeastern University, Boston, MA, USA
3. Department of Neurology, Tor Vergata Polyclinic and Laboratory of Neuromotor Physiology, IRCCS Fondazione Santa Lucia, Rome, Italy
4. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
5. Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA