1. Department of Urology and Pediatric Urology, University Hospital of Würzburg, Julius-Maximillians University, Würzburg, Germany
2. Institute of Pathology, University of Luebeck, University Hospital Schleswig-Holstein, Campus Luebeck, Luebeck, Germany
3. Department of Pathology, Research Center Borstel, Leibniz Lung Center, Borstel, Germany
4. Department of Urology, University Hospital, Eberhard-Karls University, Tübingen, Germany