1. Department of Radiology, Samsung Medical Center, Seoul, Korea
2. Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
3. Department of Internal Medicine, Kyungpook National University Hospital, College of Medicine, Kyungpook National University, Daegu, Korea
4. Department of Radiology, Chosun University Hospital, Chosun University College of Medicine, Gwangju, Korea
5. Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
6. Department of Radiology, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
7. Department of Radiology, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
8. Department of Radiology, Research Institute of Radiological Science, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
9. Department of Radiology, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
10. Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
11. Department of Internal Medicine, Gachon University Gil Medical Center, Gachon University College of Medicine, Incheon, Korea
12. Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea