1. Department of Otorhinolaryngology–Head and Neck SurgeryCHA Bundang Medical Center, CHA University Seongnam Korea
2. Department of Otorhinolaryngology–Head and Neck SurgeryHallym University College of Medicine Anyang Korea
3. Department of Internal MedicineHallym University College of Medicine Anyang Korea
4. Department of Laboratory MedicineHallym University College of Medicine Anyang Korea