1. Department of Anatomy, Yonsei University College of Medicine, Seoul, Republic of Korea
2. BK21 PLUS project for Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
3. Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, Republic of Korea
4. Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Republic of Korea