1. Department of Radiology; Korea University College of Medicine; Seoul Korea
2. Department of Radiology; Seoul National University Hospital and College of Medicine; Seoul Korea
3. Department of Radiology and Research Institute of Radiology, Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
4. Department of Radiology, Seoul St Mary's Hospital, College of Medicine; The Catholic University of Korea; Seoul Korea
5. Department of Radiology, Boramae Medical Center, College of Medicine; Seoul National University and College of Medicine; Seoul Korea
6. Department of Radiology, Severance Hospital, Research Institute of Radiological Science; Yonsei University College of Medicine; Seoul Korea
7. Department of Radiology; Ajou University School of Medicine; Suwon Korea
8. Department of Surgery; Seoul National University Hospital and College of Medicine; Seoul Korea
9. Department of Otolaryngology - Head and Neck Surgery; Korea University College of Medicine; Seoul Korea
10. Department of Biostatistics; Korea University College of Medicine; Seoul Korea
11. Department of Radiology; Gang Neung Asan Hospital; Gangneung-si Korea
12. Department of Radiology; Human Medical Imaging and Intervention Center; Seoul Korea