1. Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon, South Korea
2. Department of Pathology, Eulji University School of Medicine, Daejeon, South Korea
3. Department of Urology, College of Medicine, Chungbuk National University, Cheongju, South Korea
4. Department of Urology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
5. Department of Urology, Eulji University Hospital, Eulji University School of Medicine, Daejeon, South Korea