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