1. Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, Hufelandstrasse 55, 45147 Essen, Germany
2. Department of Hematology and Stem Cell Transplantation, West German Tumor Center, University Hospital Essen, Hufelandstrasse 55, 45147 Essen, Germany
3. Institute of Molecular Biology, University of Duisburg-Essen, Hufelandstrasse 55, 45147 Essen, Germany
4. Department of Nuclear Medicine, Klinikum Stuttgart, Kriegsbergstrasse 60, 70174 Stuttgart, Germany
5. Department of Nuclear Medicine, University Hospital Essen, Hufelandstrasse 55, 45147 Essen, Germany