1. Department of Radiology, Anam Hospital College of Medicine, Korea University Seoul Republic of Korea
2. Department of Surgery, Anam Hospital College of Medicine, Korea University Seoul Republic of Korea
3. Department of Radiology, Ansan Hospital College of Medicine, Korea University Ansan‐si Gyeonggi‐do Republic of Korea
4. Department of Radiology, Guro Hospital College of Medicine, Korea University Seoul Republic of Korea