1. University of Würzburg; Department of Anaesthesia and Critical Care; Oberduerrbacher Str. 6 Würzburg Germany
2. Paracelsus Medical University; Department of Anesthesiology, Perioperative and Intensive Care Medicine; Salzburg Austria
3. Universitatsklinikum Bergmannsheil GmbH Bochum; Department of Anaesthesiology, Intensive Care Medicine, Palliative Care Medicine and Pain Management; Ruhr University Bochum Germany
4. University Hospital Münster; Department of Anesthesiology, Intensive Care and Pain Medicine; Münster Germany