Treatment decision-making in localized prostate cancer: why patients chose either radical prostatectomy or external beam radiation therapy - Ihrig, Andreas; Keller, Monika; Hartmann, Mechthild; Debus, Jürgen; Pfitzenmaier, Jesco; Hadaschik, Boris; Hohenfellner, Markus; Herzog, Wolfgang; Huber, Johannes (BJU international, 2011)