1. Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea.
2. Robotics Program, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea.
3. Department of Robotics Engineering, Daegu Kyeongbuk Institute of Science and Technology (DIGIST), Daegu, Republic of Korea.
4. EasyEndo Surgical Inc., Daejeon, Republic of Korea.