Institution: | 1. Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Republic of Korea;2. Department of Nuclear Medicine, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Republic of Korea;3. Department of Otorhinolaryngology, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Republic of Korea |