1. Department of Biomedical Science and Technology, Graduate School, Kyung Hee University, Seoul, Republic of Korea
2. Department of Otolaryngology–Head and Neck Surgery, Kyung Hee University Medical Center, Seoul, Republic of Korea
3. Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyung Hee University, Seoul, Korea
4. Department of Radiation Oncology, Kyung Hee University Medical Center, Seoul, Republic of Korea
5. Department of Preventive Medicine, College of Korean Medicine, Kyung Hee University, Seoul, Korea