1. Department of Otolaryngology–Head and Neck Surgery, School of Medicine, Hanyang University, Seoul, Republic of Korea
2. Biostatistical Consulting and Research Laboratory, Medical Research Collaborating Center, Hanyang University, Seoul, Republic of Korea
3. Department of Emergency Medicine, School of Medicine, Hanyang University, Seoul, Republic of Korea
4. Division of Cardiology, Department of Internal Medicine, School of Medicine, Hanyang University, Seoul, Republic of Korea