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1. Department of Urology, School of Medicine, Sungkyunkwan University, 2. Department of Urology, Kwandong University College of Medicine, 3. Department of Urology, Eulji University School of Medicine, 4. Department of Urology, National Medical Center, 5. Department of Urology, Asan Medical Center, Univerity of Ulsan College of Medicine, 6. Department of Urology, Korea University College of Medicine
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