1. Department of Radiology, School of Medicine, Kyungpook National University, Daegu, Korea.
2. Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Korea.
3. Medical Research Collaboration Center in Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Korea.
4. Department of Radiology, Keimyung University Dongsan Hospital, Daegu, Korea.
5. Department of Radiology, Daegu Fatima Hospital, Daegu, Korea.
6. Department of Radiology, College of Medicine, Yeungnam University, Daegu, Korea.
7. Department of Radiology, Yeungnam University Medical Center, Daegu, Korea.