1. Department of Radiology, Ajou University Medical Center, Suwon, Korea.
2. Musculoskeletal Imaging Laboratory, Ajou University Medical Center, Suwon, Korea.
3. Department of Biomedical Informatics, Ajou University School of Medicine, Suwon, Korea.
4. Office of Biostatistics, Medical Research Collaborating Center, Ajou Research Institute for innovative Medicine, Ajou University Medical Center, Suwon, Korea.