1. Department of Anaesthesiology, Intensive Care and Pain Medicine; University Hospital of Münster,; Albert-Schweitzer-Campus 1,; Münster; Germany
2. Department of Anaesthesiology and Intensive Care; University Hospital of Würzburg; Würzburg; Germany
3. Department of Anaesthesiology, Intensive Care Medicine; Palliative Care Medicine and Pain Management; Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil GmbH Bochum; Ruhr University Bochum,; Bochum; Germany