1. Department of Anatomy, Chonnam National University Medical School, Hwasun 58128, Korea.
2. Biomedical Science Graduate Program (BMSGP), Chonnam National University, Hwasun 58128, Korea.
3. Department of MRC, Chonnam National University Medical School, Hwasun 58128, Korea.
4. Department of Otolaryngology-Head and Neck Surgery, Chonnam National University Medical School and Hwasun Hospital, Hwasun 58128, Korea.