title: Author'S reply.
authors: Department of Urology, Eberhard-Karls University, Tuebingen, Germany.
authors: Allen
authors: A
authors: Sim
authors: Department of Urology, Eberhard-Karls University, Tuebingen, Germany.
authors: Tilman
authors: T
authors: Todenhöfer
authors: Department of Urology, Eberhard-Karls University, Tuebingen, Germany.
authors: Johannes
authors: J
authors: Mischinger
authors: Department of Urology, Eberhard-Karls University, Tuebingen, Germany.
authors: Omar
authors: O
authors: Halalsheh
authors: Department of Urology, Eberhard-Karls University, Tuebingen, Germany.
authors: Johannes
authors: J
authors: Boettge
authors: Department of Urology, Eberhard-Karls University, Tuebingen, Germany.
authors: Steffen
authors: S
authors: Rausch
authors: Department of Urology, Eberhard-Karls University, Tuebingen, Germany.
authors: Simone
authors: S
authors: Bier
authors: Department of Urology, Eberhard-Karls University, Tuebingen, Germany.
authors: Stefan
authors: S
authors: Aufderklamm
authors: Department of Urology, Eberhard-Karls University, Tuebingen, Germany.
authors: Arnulf
authors: A
authors: Stenzl
authors: Department of Urology, Eberhard-Karls University, Tuebingen, Germany.
authors: Georgios
authors: G
authors: Gakis
authors: Department of Urology, Eberhard-Karls University, Tuebingen, Germany.
authors: Christian
authors: C
authors: Schwentner