1. Department of Pediatrics, University of Ulsan College of Medicine, Seoul, Korea.
2. Department of Pediatrics, Keimyung University School of Medicine, Daegu, Korea.
3. Department of Pediatrics, Chonnam National University Medical School, Gwangju, Korea.
4. Department of Pediatrics, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
5. Department of Pediatrics, Chungbuk National University College of Medicine, Cheongju, Korea.
6. Department of Pediatrics, College of Medicine, Seoul National University, Seoul, Korea.
7. Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea.
8. Department of Pediatrics, Institute of Medical Science, Gyeongsang National University College of Medicine, Gyeongsang National University Hospital, Jinju, Korea.
9. Department of Pediatrics, Presbyterian Medical Center, Jeonju, Korea.
10. Department of Pediatrics, CHA Gangnam Medical Center, CHA University, Seoul, Korea.
11. Department of Pediatrics, Pusan National University School of Medicine, Yangsan, Korea.
12. Department of Pediatrics, Ewha Womans University Medical Center, Seoul, Korea.
13. Department of Pediatrics, Bundang Jesaeng General Hospital, Seongnam, Korea.
14. Department of Pediatrics, Inje University Paik Hospital, Busan, Korea.
15. Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, Korea.