title: Letter to the Editor.
authors.affiliation: Department of Urology, Universityhospital Cologne, Germany. Electronic address: thkuru@gmail.com.
authors.forename: Timur H
authors.initials: TH
authors.lastname: Kuru
authors.affiliation: Department of Radiology, German Cancer Research Center, Heidelberg, Germany.
authors.forename: Heinz-Peter
authors.initials: HP
authors.lastname: Schlemmer
authors.affiliation: MVZ Conradia, Alte Holstenstr. 16, 21031 Hamburg, Germany.
authors.forename: Matthias A
authors.initials: MA
authors.lastname: Roethke