1. Dept. of Nursing, Masan University, 2640, Hammadaero, Naeseo-eup, MasanHoiwon gu, Chanwon-si, 51217, Korea
2. Korea Institute of Industrial Technology, Gwangju, 61012, Korea
3. School of Information and Communication Engineering, Sungkyunkwan University, Suwon, 16419, Korea
4. Department of Electronics, Chosun College of Science and Technology, Gwangju, 61453, Korea