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From the *Department of Pediatrics, Seoul National University Children's Hospital,
Seoul, South Korea; †Department of Biostatistics, Yonsei University, Seoul, South
Korea; ‡Department of Pediatrics, Yonsei University Severance Hospital, Seoul, South
Korea; §Department of Pediatrics, The Catholic University of Korea, Seoul, South Korea;
¶Department of Pediatrics, The Catholic University of Korea, Incheon, South Korea;
‖Department of Pediatrics, Kyung Hee University Hospital, Seoul, South Korea; **Department
of Pediatrics, University of Ulsan College of Medicine, Seoul, South Korea; ††Department
of Pediatrics, Bundang Jesaeng General Hospital, Gyeonggi-do, South Korea; and ‡‡Department
of Pediatrics, The Catholic University of Korea, Daejeon, South Korea.