1. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
2. Media Lab, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
3. Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
4. McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
5. IQS School of Engineering, Ramon Llull University, 08017 Barcelona, Spain.
6. Department of Materials Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.