1. Department of Diagnostic and Interventional Radiology; University Medical Centre Hamburg-Eppendorf; Hamburg Germany
2. Heinrich-Pette-Institute for Experimental Virology and Immunology of the University of Hamburg; Hamburg Germany
3. Department of Anatomy II: Experimental Morphology; University Medical Centre Hamburg-Eppendorf; Hamburg Germany
4. Institute of Physical Chemistry; University Hamburg; Hamburg Germany
5. Department of Medical Biometry and Epidemiology; University Medical Centre Hamburg-Eppendorf; Hamburg Germany
6. Department of Biochemistry and Molecular Biology II; University Medical Centre Hamburg-Eppendorf; Hamburg Germany