1. Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Korea.
2. Department of Urology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Korea.
3. Department of Oncology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Korea.