1. Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
2. Center for Extreme Bionics, MIT Media Lab, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
3. Department of Plastic and Reconstructive Surgery, Brigham and Women’s Hospital, Boston, MA 02115, USA.
4. Department of Media Arts and Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.