| Affiliation: | 1. Department of Pediatrics, Seoul National University Bundang Hospital, Seongnam, Korea;2. Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea;3. Department of Pediatrics, Seoul National University Children''s Hospital, 101 Daehak-ro, Jongno-gu, Seoul 110-769, Korea;4. Department of Pediatrics, Kosin University College of Medicine, Busan, Korea;5. Department of Pediatrics, Seoul National University College of Medicine, Seoul, Korea, Korea |
