1. Department of Physics and Astronomy, University of Southern California, Los Angeles, CA 90089
2. Department of Quantitative and Computational Biology, University of Southern California, Los Angeles, CA 90089
3. Laboratory of Molecular Neurobiology and Biophysics, The Rockefeller University, New York, NY 10065
4. HHMI, The Rockefeller University, New York, NY 10065