1. Department of Radiology, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
2. Department of Radiology, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
3. Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea.
4. Department of Radiology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
5. Department of Radiology, Hanyang University College of Medicine, Seoul, Republic of Korea.
6. Department of Radiology, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea.
7. Department of Radiology, Kyung Hee University Hospital, Seoul, Republic of Korea.