1. Department of Orthopedic Surgery, College of Medicine Ewha Womans University Seoul Hospital Seoul South Korea
2. Department of Orthopedic surgery Yonsei University College of Medicine Seoul South Korea
3. Biostatistics Collaboration Unit, Department of Biomedical Systems Informatics Yonsei University College of Medicine Seoul South Korea
4. Department of Periodontology, Research Institute for Periodontal Regeneration Yonsei University College of Dentistry Seoul South Korea
5. Department of Orthopedic Surgery Catholic Kwandong University International Saint Mary's Hospital Incheon South Korea
6. Division of Biostatistics, Department of Biomedical Systems Informatics Yonsei University College of Medicine Seoul South Korea