1. Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, the Republic of Korea.
2. Department of Pediatrics, Kyungpook National University School of Medicine, Daegu, the Republic of Korea.
3. Department of Pediatrics, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, the Republic of Korea.
4. Department of Pediatrics, College of Medicine, Korea University, Seoul, the Republic of Korea.
5. Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, the Republic of Korea.
6. Department of Orthopedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, the Republic of Korea.