1. McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology (MIT), Cambridge;
2. Biomedical Engineering Department, Tufts University, Medford;
3. Howard Hughes Medical Institute and Center for Brain Science, Harvard University, Cambridge;
4. The MIT Media Laboratory and MIT Department of Biological Engineering, MIT, Cambridge; and
5. Center for Biodynamics and Departments of Mathematics and Statistics, Boston University, Boston, Massachusetts