1. Clinic and Polyclinic for Dermatology and Venerology, Andrological Section, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
2. Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
3. Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
4. Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University of Leipzig, 04103 Leipzig, Germany
5. Department of Urology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany