1. Department of Anaesthesiology, Intensive Care and Pain Medicine; University Hospital Muenster; Muenster Germany
2. Department of Anaesthesiology, Intensive Care, Emergency and Pain Medicine; University Hospital Wuerzburg; Wuerzburg Germany
3. Department of Anaesthesiology, Intensive Care Medicine and Pain Management; BG-Universitätsklinikum Bergmannsheil gGmbH; Bochum Germany