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