1. George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
2. IEN Center for Human-Centric Interfaces and Engineering at the Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA 30332, USA.
3. Major of Human Biocovergence, Division of Smart Healthcare, College of Information Technology and Convergence, Pukyong National University, Busan, 48513, Republic of Korea.
4. School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
5. Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30332, USA.
6. Parker H. Petit Institute for Bioengineering and Biosciences, Neural Engineering Center, Institute for Materials, Institute for Robotics and Intelligent Machines, Georgia Institute of Technology, Atlanta, GA 30332, USA.