1. Department of Hematology, Oncology and Immunology at the Philipps-University Marburg; Baldinger Strasse, Marburg, Germany
2. Institute of Medical Biometry and Epidemiology at the Philipps-University Marburg, Bunsenstrasse 3, Marburg, Germany
3. Institute of Pathology at the Philipps-University Marburg; Baldinger Strasse, Marburg
4. Department of Urology at the Heinrich-Heine-University Düsseldorf; Moorenstrasse 5, Düsseldorf, Germany
5. Department of Oncology, University Hospital Zurich, Raemistrasse 100, Zurich, Switzerland
6. Institute of Microbiology at the Philipps-University Marburg, Hans-Meerwein Strasse, Marburg, Germany