1. Institute for Diagnostic and Interventional Radiology, Klinikum Oldenburg AöR, Oldenburg, Germany
2. Department of Anaesthesia, Intensive care medicine, Emergency medicine and Pain therapy, University Hospital, Klinikum Oldenburg AöR, Oldenburg, Germany
3. Department of Cardiac Surgery, University Hospital, Klinikum Oldenburg AöR, Oldenburg, Germany