1. Department of Pediatrics, Gyeongsang National University School of Medicine, Gyeongsang Institute of Health Science, Jinju, Korea.
2. Department of Otorhinolaryngology, Gyeongsang National University School of Medicine, Gyeongsang Institute of Health Science, Jinju, Korea.
3. Department of Microbiology, Gyeongsang National University School of Medicine, Gyeongsang Institute of Health Science, Jinju, Korea.
4. Department of Microbiology, Chung-Ang University College of Medicine, Seoul, Korea.