1. Department of Radiology, Anam Hospital, College of MedicineKorea University Seoul Korea
2. Department of RadiologySoonchunhyang University Hospital Gyeonggi‐do Korea
3. Department of Radiology, Dongsan Medical CenterKeimyung University Daegu Korea
4. Department of RadiologyKorea University Guro Hospital Seoul Korea
5. Department of Diagnostic Radiology, Bucheon St. Mary's HospitalCatholic University of Korea Gyeonggi‐do Korea
6. Department of RadiologyPusan National University Yangsan Hospital Gyeongsangnam‐do Korea
7. Department of RadiologyKangbuk Samsung Hospital Seoul Korea
8. Department of RadiologyChungbuk National University Hospital Chungcheongbuk‐do Korea
9. Department of RadiologyHaeundae Paik Hospital Busan Korea
10. Department of RadiologyAjou University Medical Center Suwon‐si Korea