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, Seoul, Republic of Korea.
3. Lunit, Seoul, Republic of Korea.
4. Department of Radiology, Seoul Metropolitan Government, Seoul National University Boramae Medical Center, Seoul, Republic of Korea.