1. Department of Pediatrics, Inje University Sanggye Paik Hospital, Seoul, Korea.
2. Department of Pediatrics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea.
3. Department of Biostatistics, Clinical Trial Center, Soonchunhyang University Bucheon Hospital, Bucheon, Korea.
4. Department of Pediatrics, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Korea.
5. Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea.
6. Department of Pediatrics, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea.
7. Department of Pediatrics, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea.
8. Department of Pediatrics, Pusan National University Children’s Hospital, Yangsan, Korea.
9. SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul, Korea.
10. Departmentof Pediatrics, Dankook University Hospital, Dankook University Medical School, Cheonan, Korea.
11. Department of Pediatrics, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
12. Department of Pediatrics, Soonchunhyang University Gumi Hospital, Soonchunhyang University College of Medicine, Gumi, Korea.
13. Department of Pediatrics, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea.
14. Department of Pediatrics, Eulji General Hospital, Eulji University, Seoul, Korea.
15. Department of Pediatrics, Korea Cancer Center Hospital, Ilsan, Korea.
16. Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
17. Department of Pediatrics, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea.
18. Department of Pediatrics, National Health Insurance Service Ilsan Hospital, Ilsan, Korea.
19. Department of Pediatrics, Catholic University of Daegu School of Medicine, Daegu, Korea.
20. Department of Pediatrics, Chungnam National University School of Medicine, Daejeon, Korea.
21. Department of Pediatrics, Dongguk University Gyeongju Hospital, Gyeongju, Korea.
22. Departmentof Pediatrics, Seoul National University Children Hospital, Seoul, Korea.
23. Department of Pediatrics, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea.
24. Department of Pediatrics, The Catholic University of Korea Uijeongbu St. Mary's Hospital, Uijeongbu, Korea.
25. Department of Pediatrics, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.