1. Soonchunhyang Institute of Medi-bio Science (SIMS), Soonchunhyang University, Cheonan 31151, Korea
2. Department of Integrated Biomedical Science, Soonchunhyang University, Asan 31538, Korea
3. Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Soonchunhyang University, Cheonan 31151, Korea