1. Department of Pediatrics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea.
2. Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu, Korea.
3. Department of Pediatrics, Ajou University School of Medicine, Suwon, Korea.
4. Department of Pediatrics, Chungnam National University Hospital, Daejeon, Korea.
5. Department of Pediatrics, Hallym University College of Medicine, Chuncheon, Korea.
6. Department of Pediatrics, Korea University Anam Hospital, Seoul, Korea.
7. Department of Pediatrics, Kosin University Gospel Hospital, Kosin University College of Medicine, Busan, Korea.
8. Department of Pediatrics, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea.
9. Department of Pediatrics, Nowon Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea.
10. Department of Pediatrics, Chung-Ang University Hospital, College of Medicine, Chung-Ang University, Seoul, Korea.
11. Department of Pediatrics, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea.
12. Department of Pediatrics, Inje University Ilsan Paik Hospital, Goyang, Korea.
13. Department of Pediatrics, Daegu Catholic University School of Medicine, Daegu, Korea.
14. Department of Pediatrics, Daejeon Eulji Medical Center, Eulji University School of Medicine, Daejeon, Korea.
15. Department of Pediatrics, Yonsei University Wonju College of Medicine, Wonju, Korea.
16. Department of Pediatrics, Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju, Korea.
17. Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea.