1. Department of Microbiology, Yonsei University Wonju College of Medicine, Wonju, Korea.
2. Institute of Basic Medical Science, Yonsei University Wonju College of Medicine, Wonju, Korea.
3. Department of Microbiology, College of Medicine, Kwandong University, Gangneung, Korea.
4. Division of Life Sciences, College of Natural Sciences, Kangwon National University, Chuncheon, Korea.
5. Department of Otolaryngology-Head and Neck Surgery, University Wonju College of Medicine, Wonju, Korea.