1. Department of Pharmacology, Penn State College of Medicine, Hershey, Pennsylvania 17033-0850, United States
2. Department of Neurosurgery, Penn State College of Medicine, Hershey, Pennsylvania 17033-0850, United States
3. Center for Neural Engineering, Pennsylvania State University, University Park, State College, Pennsylvania 16801, United States
4. Department of Biomedical Engineering, Pennsylvania State University, University Park, State College, Pennsylvania 16801, United States
5. Department of Biochemistry & Molecular Biology, Penn State College of Medicine, Hershey, Pennsylvania 17033-0850, United States
6. Department of Engineering Science & Mechanics, Pennsylvania State University, University Park, State College, Pennsylvania 16801, United States
7. Department of Chemistry, Pennsylvania State University, University Park, State College, Pennsylvania 16801, United States