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1 Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Kyung Hee University Hospital at Gangdong, Seoul, South Korea (Lee, Lee) Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Kyung Hee Medical Center, Seoul, South Korea (Shin, Kim, Cho).
1 Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Kyung Hee University Hospital at Gangdong, Seoul, South Korea (Lee, Lee) Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Kyung Hee Medical Center, Seoul, South Korea (Shin, Kim, Cho).