1. Department of Orthopedic Surgery, Seoul National University College of Medicine, SMG-SNU Boramae Medical Center, Seoul, Republic of Korea.
2. Department of Orthopedic Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
3. Department of Orthopedic Surgery, Murup Hospital, Gyeongnam, Republic of Korea.
4. Department of Biostatistics, SMG-SNU Boramae Medical Center, Seoul, Republic of Korea.