1 From the v. Bodelschwingh Foundation Bethel, University Hospital Bielefeld, Bielefeld University (FM), Department of Anaesthesiology and Intensive Care Medicine, Hospital Barmherzige Brueder, Munich, Germany (FB), Department of Anesthesiology, University of Illinois College of Medicine, Chicago, Illinois, USA (GJ-C), Department of Anaesthesiology, Amsterdam UMC, location AMC, Amsterdam, Netherlands (MW-H), Department of Anesthesiology and Intensive Care, Clinical Hospital №9, Izhevsk, Russia (AK), Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden (PA-L), Division of Neonatology and Paediatric Critical Care Medicine, University Medical Center Eppendorf, Hamburg, Germany (DS), Clinic of Anaesthesiology, Hannover Medical School, Hannover, Germany (RS), Department of Anaesthesiology, Friedrichshafen Regional Medical Center, Friedrichshafen, Germany (VW), Physioklin, Mainz (RZ) and Department of Anaesthesiology and Intensive Care Medicine, St. Josef Hospital, Moers, Germany (TZ).