1. Internal Medicine, Department of Hematology/Oncology/Bone Marrow Transplantation, University Hospital Hamburg-Eppendorf, Hamburg;
2. Institute of Anatomy, University Hospital Hamburg-Eppendorf, Hamburg;
3. Institute of Anatomy I, University Hospital Essen, Essen;
4. Department of Pathology, University Hospital Hamburg-Eppendorf, Hamburg;
5. Department of Cardiology, University Hospital Lübeck, Lübeck; and
6. Department of Urology, University Hospital Groβhadern, Munich, Germany