1. Department of Otorhinolaryngology, Masan Samsung Hospital, Sungkyunkwan University School of Medicine, Masan, Korea.
2. Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
3. Department of Otorhinolaryngology-Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.