1. Department of Pediatrics, College of Medicine, Hanyang University, Seoul, Korea.
2. Department of Pediatrics, Hanyang University Guri Hospital, Guri, Korea.
3. Department of Otolaryngology, College of Medicine, Hanyang University, Seoul, Korea.
4. Department of Pediatrics, College of Medicine, Seoul National University, Seoul, Korea.
5. Impact-based Forecast Research Team, High Impact Weather Research Department, National Institute of Meteorological Sciences, Seogwipo, Korea.
6. Department of Statistics, College of Science, Dongguk University, Seoul, Korea.