1. Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
2. Department of Orthopaedic Surgery, CHA University School of Medicine, Seongnam-si, Gyeonggi-do Province, Republic of Korea
3. Department of Orthopaedic Surgery, Nowon Eulji Medical Center, Eulji University, Seoul, Korea
4. Department of Orthopedic Surgery, Ilsan Paik Hospital, Inje University, Goyang-si, Gyeonggi-do Province, Republic of Korea