1. Department of Radiology Seoul National University Hospital 101 Daehak‐ro, Jongno‐gu, Seoul 03080 Republic of Korea
2. Department of Radiology Seoul National University College of Medicine 103 Daehak‐ro, Jongno‐gu, Seoul 03087 Republic of Korea
3. Department of Radiology Seoul National University Bundang Hospital Seongnam‐si 13620 Republic of Korea
4. Department of Radiology Hallym University Sacred Heart Hospital Anyang 14068 Republic of Korea
5. Department of Radiology Inje University Busan Paik Hospital Bokji‐ro 75, Busangjin‐gu, Busan 47392 Republic of Korea
6. Department of Radiology Jeju National University Hospital Jeju‐si 63241 Republic of Korea
7. Department of Radiology Chung‐Ang University Hospital 101 Heukseok‐ro, Dongjak‐gu, Seoul 06973 Republic of Korea
8. Department of Internal Medicine Seoul National University Hospital 101 Daehak‐ro, Jongno‐gu, Seoul 03080 Republic of Korea
9. Institute of Radiation Medicine Seoul National University Medical Research Center 103 Daehak‐ro, Jongno‐gu, Seoul 03087 Republic of Korea