1. Department of Physics, University of California, Berkeley, Berkeley, California, USA
2. Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, California, USA
3. Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
4. Department of Statistics, Oregon State University, Corvallis, Oregon, USA
5. Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
6. Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, California, USA