1 Department of Urology, Luzerner Kantonsspital, University of Lucerne, Lucerne, Switzerland.
2 Institute of Urology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA; Department of Urology, Uro-Oncology, Robot Assisted and Reconstructive Urologic Surgery, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.
3 Department of Radiation Oncology, University Hospital Basel, Basel, Switzerland.
4 Department of Urology, Luzerner Kantonsspital, University of Lucerne, Lucerne, Switzerland. Electronic address: cdfankhauser@gmail.com.