1. Department of Physical Therapy, Sahmyook University Seoul, Republic of Korea
2. Department of rehabilitation team, Ilsan hospital, Ilsan-ro 100, Ilsandong-gu, Goyang-si, Gyeonggi-do, Republic of Korea
3. Human Enhancement & Assistive Technology Research Section, Artificial Intelligent Research Laboratory, Electronics and Telecommunications Research Institute, Daejeon, Republic of Korea
4. Robot Business Team, Samsung Electronics, Suwon, Republic of Korea