1. Department of Pediatrics, Yeungnam University College of Medicine, Daegu, Korea.
2. Department of Pediatrics, Seoul National University College of Medicine, Seoul, Korea.
3. Seoul National University Cancer Institute, Seoul, Korea.
4. Department of Pediatrics, Chonnam National University Hwasun Hospital, Chonnam National University Medical School, Gwangju, Korea.
5. Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, Korea.
6. Department of Hematology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
7. Department of Pediatrics, Pusan National University School of Medicines, Yangsan, Korea.
8. Division of Pediatric Hematology/Oncology, Department of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul, Korea.
9. Department of Pediatrics, Samsung Medical Center, School of Medicine, Sungkyunkwan University, Seoul, Korea.
10. Department of Pediatrics and Research Institute of Clinical Medicine of Jeonbuk National University-Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju, Korea.
11. Department of Pediatrics, Daegu Fatima Hospital, Daegu, Korea.
12. Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Korea.
13. Division of Pediatric Hematology and Oncology, Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea.
14. Department of Pediatrics, Keimyung University School of Medicine, Keimyung University Dongsan Medical Center, Daegu, Korea.
15. Division of Hemato-oncology, Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea.
16. Department of Pediatrics, Chungnam National University College of Medicine, Daejeon, Korea.
17. Department of Pediatrics, Gachon University Gil Medical Center, Incheon, Korea.
18. Department of Pediatrics, Dong-A University College of Medicine, Busan, Korea.
19. Department of Hematology, Dong-A University Hospital, Busan, Korea.
20. Department of Pediatrics, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
21. Departments of Pediatrics, Ajou University School of Medicine, Suwon, Korea.
22. Center for Pediatric Oncology, Research Institute and Hospital, National Cancer Center, Goyang, Korea.
23. Departments of Pediatrics, Inha University Hospital, Incheon, Korea.
24. Department of Pediatrics, Gyeongsang National University School of Medicine, Jinju, Korea.
25. Department of Pediatrics, School of Medicine, University of Ulsan, Ulsan, Korea.
26. Department of Pediatrics, Daegu Catholic University School of Medicine, Daegu, Korea.
27. Department of Pediatrics, Chungbuk National University Hospital, Cheongju, Korea.
28. Department of Pediatrics, Korea Cancer Center Hospital, Seoul, Korea.