1. 1Center for Anesthesiology, Emergency and Intensive Care Medicine, University Hospital, Georg August University Göttingen, Göttingen, Germany
2. 2Center for Hepatology and Gastroenterology, Charité University Hospital Berlin, Campus Virchow, Berlin, Germany
3. 3Orthopadic Practice for Ambulant Surgery, Baunatal, Germany
4. 4Anesthesia Practice for Ambulant Surgery, Baunatal, Germany
5. 5Clinic for Anesthesiology, University Hospital Regensburg, Regensburg, Germany
6. 6Department of Cardiothoracic Transplantation and Mechanical Circulatory Support, Royal Brompton & Harefield Hospital, London, UK