1 School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea.
2 School of Mechanical Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea.
3 Department of Neurology, Chonnam National University Medical School, Gwangju, 61469, Republic of Korea.
4 Department of Biomedical Sciences, Chonnam National University Medical School, Gwangju, 61469, Republic of Korea.
5 Department of Robotics Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 42988, Republic of Korea. soheekim@dgist.ac.kr.