1. Department of Pediatrics, Keimyung University School of Medicine, Keimyung University Dongsan Medical Center, Daegu, Korea.
2. Deparment of Pediatrics, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
3. Department of Pediatrics, Seoul National University College of Medicine, Seoul National University Cancer Research Institute, Seoul National University Children's Hospital, Seoul, Korea.
4. Department of Pediatrics, Daegu Fatima Hospital, Daegu, Korea.
5. Department of Pediatrics, Yeungnam University College of Medicine, Daegu, Korea.
6. Department of Pediatrics, Pusan National University School of Medicine, Pusan National University Children's Hospital, Yangsan, Korea.
7. Department of Pediatrics, Chonnam National University Hwasun Hospital, Chonnam National University Medical School, Gwangju, Korea.
8. Department of Pediatrics, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
9. Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
10. Department of Pediatrics, Ajou University School of Medicine, Suwon, Korea.
11. Department of Pediatrics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
12. Department of Pediatrics, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, Korea.
13. Department of Pediatrics, Gyeongsang National University College of Medicine, Gyeongsang National University Hospital, Jinju, Korea.
14. Department of Pediatrics, University of Ulsan College of Medicine, Asan Medical Center Children's Hospital, Seoul, Korea.
15. Department of Pediatrics, Dong-A University College of Medicine, Busan, Korea.
16. Department of Pediatrics, Inha University Hospital, Incheon, Korea.
17. Department of Pediatrics, Chosun University Hospital, Gwangju, Korea.
18. Department of Pediatrics, Ewha Womans University College of Medicine, Ewha Womans University Seoul Hospital, Seoul, Korea.
19. Department of Pediatrics, Center for Pediatric Cancer, National Cancer Center, Goyang, Korea.
20. Department of Pediatrics, Jeju National University Hospital, Jeju National University School of Medicine, Jeju, Korea.
21. Department of Pediatrics, Inje University College of Medicine, Busan Paik Hospital, Busan, Korea.
22. Department of Pediatrics, Cha Bundang Medical Center, Cha University, Seongnam, Korea.
23. Department of Pediatrics, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea.
24. Department of Pediatrics, Hanyang University Seoul Hospital, Seoul, Korea.
25. Department of Pediatrics, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
26. Department of Pediatrics, Daegu Catholic University School of Medicine, Daegu, Korea.
27. Department of Pediatrics, Kosin University College of Medicine, Kosin University Gospel Hospital, Busan, Korea.