1. Department of Pathology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea.
2. Department of Urology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea.
3. School of Mechanical Engineering, Pusan National University, Busan, Korea.
4. Department of Occupational and Environmental Medicine, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea.
5. Department of Urology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea.
6. Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea.