1. Clinic and Polyclinic for General Surgery, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
2. Clinic and Polyclinic for Operative Dentistry and Periodontology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
3. Faculty of Veterinary Medicine, Institute of Veterinary Anatomy, Freie Universität Berlin, Berlin, Germany
4. Center for Medical Basic Research, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
5. Department of Radiology, Charité -University Medicine Berlin, Berlin, Germany
6. Department of Clinical Haemostasiology and Transfusion Medicine, University of Saarland, Homburg (Saar), Germany