1. Department of Urology, Hallym University Kangdong Sacred Heart Hospital, Seoul, Korea
2. Department of Urology, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, Korea
3. Department of Urology, Hallym University Kangnam Sacred Heart Hospital, Seoul, Korea
4. Department of Urology, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Korea
5. Department of Urology, Hallym University Hallym Sacred Heart Hospital, Gyeonggi, Korea