[1
]
Department of Otorhinolaryngology-Head and Neck Surgery, Asan Medical Center, University
of Ulsan College of Medicine, Seoul.
[2
]
Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Kyungpook
National University, Daegu.
[3
]
Department of Otorhinolaryngology-Head and Neck Surgery, Kangwon National University
School of Medicine, Chuncheon.
[4
]
Department of Otorhinolaryngology-Head and Neck Surgery, Ulsan University Hospital,
University of Ulsan College of Medicine, Ulsan, South Korea.