1. Department of Pediatrics, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea.
2. Department of Pediatrics, Chungnam National University Sejong Hospital, Chungnam National University College of Medicine, Sejong, Korea.
3. Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, Korea.
4. Department of Pediatrics, Asthma and Allergy Center, Inje University Sanggye Paik Hospital, Seoul, Korea.
5. Department of Pediatrics, School of Medicine, Kyung Hee University, Seoul, Korea.
6. Department of Pediatrics, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea.
7. Department of Pediatrics, Soonchunhyang University Gumi Hospital, Gumi, Korea.
8. Department of Pediatrics, CHA Gangnam Medical Center, CHA University School of Medicine, Seoul, Korea.
9. Department of Pediatrics, Seoul Medical Center, Seoul, Korea.
10. Department of Pediatrics, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea.
11. Department of Pediatrics, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea.
12. Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu, Korea.
13. Department of Pediatrics, Jangheung Integrative Medical Hospital, Wonkwang University School of Medicine, Jangheung, Korea.