1. Research and Development Center of Exosystems, Seongnam, Republic of Korea
2. Department of Biomedical Science and Technology, Graduate School, Kyung Hee University, Seoul, Republic of Korea
3. Department of Physical Medicine and Rehabilitation Medicine, Kyung Hee University Medical Center, Seoul, Republic of Korea
4. Department of Biomedical Science and Technology, College of Medicine, East-West Medical Research Institute, Kyung Hee University, Seoul, Republic of Korea
5. Department of Family Medicine, Elderly Frailty Research Center, College of Medicine, Kyung Hee University, Kyung Hee University Medical Center, Seoul, Republic of Korea