title: Reply by the authors.
authors.affiliation: Department of Urology, National Health Insurance Service Ilsan Hospital, Yonsei University College of Medicine, Goyang, Korea.
authors.forename: Hyun Ho
authors.initials: HH
authors.lastname: Han
authors.affiliation: Department of Urology, National Health Insurance Service Ilsan Hospital, Yonsei University College of Medicine, Goyang, Korea.
authors.forename: Woo Jin
authors.initials: WJ
authors.lastname: Ko
authors.affiliation: Department of Urology, Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea.
authors.forename: Tag Keun
authors.initials: TK
authors.lastname: Yoo
authors.affiliation: Department of Urology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea.
authors.forename: Tae Hee
authors.initials: TH
authors.lastname: Oh
authors.affiliation: Department of Urology, Catholic University of Daegu School of Medicine, Daegu, Korea.
authors.forename: Duk Yoon
authors.initials: DY
authors.lastname: Kim
authors.affiliation: Department of Urology, Chonnam National University Medical School, Gwangju, Korea.
authors.forename: Dong Deuk
authors.initials: DD
authors.lastname: Kwon
authors.affiliation: Department of Urology, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Seok-Soo
authors.initials: SS
authors.lastname: Byun
authors.affiliation: Department of Urology, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Sun Il
authors.initials: SI
authors.lastname: Kim
authors.affiliation: Department of Urology, Veterans Health Service Medical Center, Seoul, Korea.
authors.forename: Tae Young
authors.initials: TY
authors.lastname: Jung
mesh_terms: D006801:Humans; D059411:Lower Urinary Tract Symptoms; D008297:Male; D011467:Prostate / Q000601:surgery*; D011470:Prostatic Hyperplasia; D020728:Transurethral Resection of Prostate