1. Department of Radiology, Seoul National University Hospital, Seoul, Republic of Korea.
2. Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea.
3. Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea.
4. Department of Radiology, Gangnam Center, Seoul National University Hospital Healthcare System, Seoul, Republic of Korea.
5. Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Republic of Korea.
6. Department of Radiology, SMG-SNU Boramae Medical Center, Seoul, Republic of Korea.
7. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea.