1. Department of Anaesthesiology and Intensive Care Medicine, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
2. Department of Diagnostic and Interventional Radiology, Oberlausitz-Kliniken, Bautzen, Germany
3. Department for Biometrics and Medical Informatics, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany