1. Department of Otorhinolaryngology, Head and Neck Surgery, School of Medicine, Kyung Hee University, Seoul, South Korea;
2. Department of Biochemistry and Molecular Biology, Medical Science, Engineering Research Center for Bioreaction to Reactive Oxygen Species, School of Medicine, Kyung Hee University, Seoul, South Korea;
3. Medical Science Research Institute, Kyung Hee University Medical Center, Kyung Hee University, Seoul, South Korea