1. Division of Mechanical and Automotive Engineering, College of Engineering; Wonkwang University, 460 Iksandae-ro; Iksan Jeonbuk 570-749 Republic of Korea
2. Department of Orthopedics; Daejeon St. Mary's Hospital, Catholic University of Korea, 64, Daeheung-ro; Jung-gu Daejeon 301-723 Republic of Korea
3. Hanbit System, Industrial Tools Circulating Center, 160, Daehwa-ro; Daedeok-gu Daejeon 306-754 Republic of Korea