1. Department of Healthcare Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do, 54896, Republic of Korea
2. Division of Biomedical Engineering, Jeonbuk National University, Jeonju, Jeollabuk-do 54896, Republic of Korea
3. Center for Healthcare Technology Development, Jeonbuk National University, Jeonju, Jeollabuk-do 54896, Republic of Korea
4. Research Center of Healthcare & Welfare Instrument for the Aged, Jeonbuk National University Jeonju, Jeollabuk-do 54896 Republic of Korea