1. Department of Urology; Universitätsklinikum Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg; Erlangen Germany
2. Department of Urology; Martin Luther University Halle-Wittenberg; Halle Germany
3. Center for Reproductive Medicine and Andrology; Martin Luther University Halle-Wittenberg; Halle Germany
4. Institute of Pathology; Martin Luther University Halle-Wittenberg; Halle Germany
5. Institute of Pathology; Universitätsklinikum Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg; Erlangen Germany