1. Charité Universitätsmedizin Berlin, Department of Radiology, Hindenburgdamm 30, Berlin, Germany
2. Institute of Veterinary Anatomy, Faculty of Veterinary Medicine, Freie Universitaet Berlin, Berlin, Germany
3. Department of Experimental Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany
4. Department of Clinical Haemostasiology and Transfusion Medicine, University of Saarland, Homburg (Saar), Germany
5. Center for Medical Basic Research, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany