1. Department of Orthopedic Surgery, CHA Bundang Medical Center, CHA University, Seongnam, Korea
2. Department of Orthopedic Surgery, Seoul National University College of Medicine, Seoul, Korea
3. Department of Orthopedic Surgery, Sungkyunkwan University School of Medicine, Seoul, Korea
4. Department of Orthopedic Surgery, Inje University College of Medicine, Seoul, Korea
5. Department of Orthopedic Surgery, Eulji University College of Medicine, Seoul, Korea
6. Department of Orthopedic Surgery, Chonbuk National University College of Medicine, Jeonju, Korea
7. Department of Orthopedic Surgery, Hanyang University College of Medicine, Seoul, Korea