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1. Department of Urology, School of Medicine, Kyungpook National University, 2. Department of Urology, College of Medicine, Daegu Catholic University, Daegu, Korea, 3. Department of Urology, Keimyung University School of Medicine, Daegu, Korea, 4. Department of Urology, College of Medicine, Yeungnam University, Daegu, Korea, 5. Department of Urology, College of Medicine, Dongguk University, Gyeongju, Korea
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