1. Institute of Anatomy and Clinical Morphology University of Witten/Herdecke Witten Germany
2. Department of Urology Helios Hospital Bonn Germany
3. Department of Urology Lausitzer Seenland Klinikum Hoyerswerda Germany
4. Department of Urology Assiut University Assiut Egypt
5. Institute of Anatomy University Medical Center of the Johannes Gutenberg‐University Mainz Mainz Germany
6. Department of Urology Mansoura University Mansoura Egypt
7. Department of Urology University of Ulm Ulm Germany