1. Silklab, Department of Biomedical Engineering Tufts University Medford MA 02155 USA
2. Center for Applied Brain and Cognitive Science Tufts University Medford MA 02155 USA
3. Laboratory for Living Devices Tufts University Medford MA 02155 USA
4. Department of Electrical and Computer Engineering Tufts University Medford MA 02155 USA
5. Department of Physics Tufts University Medford MA 02155 USA