1. Department of Pediatrics, Seoul National University Children's Hospital, Seoul, Korea.
2. Kidney Research Institute, Medical Research Center, Seoul National University College of Medicine, Seoul, Korea.
3. Department of Orthopedic Surgery, Seoul National University College of Medicine, Seoul, Korea.
4. Research Center for Rare Diseases, Seoul, Korea.
5. Department of Pediatrics, Chungang University Yongsan Hospital, Seoul, Korea.
6. Department of Pediatrics, Yeungnam University College of Medicine, Daegu, Korea.