1. School of Engineering and Computer Science, Washington State University, Vancouver, Washington98686, United States
2. George W. Woodruff School of Mechanical Engineering, College of Engineering, Georgia Institute of Technology, Atlanta, Georgia30332, United States
3. IEN Center for Human-Centric Interfaces and Engineering at the Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, Georgia30332, United States
4. Major of Human Bioconvergence, Division of Smart Healthcare, College of Information Technology and Convergence, Pukyong National University, Busan48513, Republic of Korea
5. Parker H. Petit Institute for Bioengineering and Biosciences, Institute for Materials, Neural Engineering Center, Institute for Robotics and Intelligent Machines, Georgia Institute of Technology, Atlanta, Georgia30332, United States
6. Department of Mechanical Engineering, University of Washington, Seattle, Washington98195, United States