1. Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea, Hoegi-dong, Dongdaemun-gu, Seoul, Korea
2. Kohwang Medical Research Institute, School of Medicine, Kyung Hee University, Seoul, Korea
3. Department of Endocrinology and Metabolism, School of Medicine, Kyung Hee University, Seoul, Korea
4. Department of Nuclear Medicine, School of Medicine, Kyung Hee University, Seoul, Korea