1. Department of Otorhinolaryngology-Head and Neck Surgery; Ilsong Memorial Institute of Head and Neck Cancer, Hallym University, College of Medicine; Seoul Korea
2. Department of Plastic and Reconstructive Surgery; Ilsong Memorial Institute of Head and Neck Cancer, Hallym University, College of Medicine; Seoul Korea
3. Department of Otorhinolaryngology-Head and Neck Surgery; Ewha Womans University, College of Medicine; Seoul Korea