1. Department of Gerontology, AgeTech-Service Convergence Major, Graduate School of East-West Medicine Science, Kyung Hee University, Yongin, Korea
2. Department of Gerontology, Graduate School of East-West Medicine Science, Kyung Hee University, Yongin, Korea
3. Man&tel. Co., Ltd, Gumi, Korea
4. The Center for Healthcare Robotics, Korea Institute of Science and Technology, Seongbuk-gu, Korea