1. Department of Otolaryngology-Head and Neck Surgery, Kyung Hee University School of Medicine, Kyung Hee University Hospital at Gangdong, Seoul, Republic of Korea
2. Department of Medicine (AgeTech-Service Convergence Major) College of Medicine, Kyung Hee University, Seoul, Republic of Korea
3. Department of Biostatistics, Epidemiology and Informatics, The Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
4. Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
5. Department of Otolaryngology-Head and Neck Surgery, Kyung Hee University School of Medicine, Kyung Hee University Medical Center, Seoul, Republic of Korea
6. Institute for Biomedical Informatics, University of Pennsylvania, Philadelphia, PA 19104, USA