1. Department of Orthopedic Surgery, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea.
2. Department of Orthopedic Surgery, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea.
3. Department of Orthopedic Surgery, Inje University Sanggye Paik Hospital, College of Medicine, Inje University, Seoul, Korea.
4. Medical Device Development Center, Osong Medical Innovation Foundation, Cheongju, Korea.