1. Department of Molecular and Cellular Biology, Center for Brain Science, Harvard University, Cambridge, MA 02138, USA.
2. Queen Mary, University of London, London E1 4NS, UK.
3. Google Research, Zürich 8002, Switzerland.
4. Google Research, Mountain View, CA 94043, USA.
5. Google Research, Seattle, WA 98103, USA.
6. Princeton Neuroscience Institute, Princeton University, Princeton, NJ 08540, USA.
7. Computer Science Department, Princeton University, Princeton, NJ 08540, USA.
8. Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea.
9. School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
10. Allen Institute for Brain Science, Seattle, WA 98109, USA.
11. Northeastern University, Boston, MA 02115, USA.
12. Computer Science Department, Boston College, Chestnut Hill, MA 02467, USA.
13. Google, Cambridge, MA 02142, USA.