1. Department of Cardiac Surgery, University of Rostock Heart Center, Rostock, Germany
2. Institute of Pathology, Rostock University Medical Center, Rostock, Germany
3. Department of Diagnostic and Interventional Radiology, Pediatric and Neuroradiology, University of Rostock, Rostock, Germany
4. Department of Cardiothoracic Surgery, Faculty of Health Sciences, University of the Free State, Bloemfontein, South Africa
5. Department of Cardiology, University of Rostock Heart Center, Rostock, Germany