1. Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea;
2. Department of Orthopedic Surgery, Asan Bone Hospital, Jeju-si, Republic of Korea;
3. Department of Orthopedic Surgery, Dongguk University Ilsan Hospital, Goyang-si, Gyeonggi-do, Republic of Korea;
4. Department of Orthopedic Surgery, Chungbuk National University Hospital, Chungcheongbuk-do, Cheongju-si, Republic of Korea; and
5. Department of Orthopedic Surgery, Asan Bone Hospital, Seoul, Republic of Korea