1. Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, Illinois 60202, United States
2. Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60202, United States
3. Epicore Biosystems, Inc., Cambridge, Massachusetts 02139, United States
4. Division of Biological Sciences, The University of Chicago, Chicago, Illinois 60637, United States
5. Departments of Materials Science and Engineering, Mechanical Engineering, Electrical and Computer Engineering, and Chemistry, Northwestern University, Evanston, Illinois 60202, United States
6. Department of Neurological Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, United States
7. Department of Mechanical Engineering, University of Hawai’i at Ma̅noa, Honolulu, Hawaii 96822, United States
8. Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawai’i at Ma̅noa, Honolulu, Hawaii 96813, United States