1. Department of Radiology, Our Lady of Mercy Hospital, College of Medicine, The Catholic University of Korea.
2. Department of Radiology, Kangnam St. Mary's Hospital, College of Medicine, The Catholic University of Korea.
3. Department of Preventive Medicine, College of Medicine, The Catholic University of Korea.
4. Department of Radiology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea.
5. Department of Radiology, St. Paul's Hospital, College of Medicine, The Catholic University of Korea.
6. Department of Radiology, St. Mary's Hospital, College of Medicine, The Catholic University of Korea.
7. Department of Radiology, Holy Family Hospital, College of Medicine, The Catholic University of Korea.