1. Department of Neurology, Korea University College of Medicine, Ansan-si 15355, Republic of Korea
2. Department of Biomedical Engineering, Konkuk University, Chungju-si, Chungcheongbuk-do 27478, Republic of Korea
3. Research Institute of Biomedical Engineering, Konkuk University, Chungju-si, Chungcheongbuk-do 27478, Republic of Korea
4. Division of Mechanical Engineering, College of Engineering, Korea Maritime and Ocean University, Busan 49112, Republic of Korea