The 2nd author was omitted. So, we would like to correct affiliation of some of the authors as shown below. Changes are marked by underlines. The authors regret these errors.
Seung Hwan Lee,1 Dae Kyung Kim,2 Joon Chul Kim,3 Kyu-Sung Lee,4 Jeong Gu Lee,5 Choal Hee Park,6 Sung Joon Hong,1 Choung-Soo Kim,7 Jong Kwan Park,8 and Byung Ha Chung1
1Department of Urology, Yonsei University College of Medicine, Seoul; 2Department of Urology, Eulji University Hospital, Daejeon; 3Department of Urology, The Catholic University of Korea College of Medicine, Seoul; 4Department of Urology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul; 5Department of Urology, Korea University College of Medicine, Seoul; 6Department of Urology, Keimyung University School of Medicine, Daegu; 7Department of Urology, Asan Medical Center, University of Ulsan College of Medicine, Seoul; 8Department of Urology, Chonbuk National University Medical School, Jeonju, Korea.