1. National Center for Adaptive Neurotechnologies, Wadsworth Center , Albany, NY, USA
2. Dept. of Mechanical and Aerospace Engineering, University of California Irvine , Irvine, CA, USA
3. Division of Biology and Biological Engineering, California Institute of Technology , Pasadena, CA, USA
4. Dept. of Mechanical Engineering, University of Idaho , Moscow, ID, USA
5. Dept. of Neurology, Stratton Veterans Administration Medical Center , Albany, NY, USA