1. Department of Anaesthesiology and Intensive Care Medicine; Hanover Medical School; Hanover Germany
2. Department of Anaesthesia; Paediatric Intensive Care and Emergency Medicine; Children's Hospital Auf der Bult; Hanover Germany
3. Department of Anaesthesiology and Intensive Care Medicine; St. Elisabeth-Krankenhaus; Halle Germany
4. Department of Paediatric Anaesthesia and Intensive Care; Children's Hospital Park Schönfeld; Kassel Germany
5. Department of Anaesthesiology; Emergency and Intensive Care Medicine; University Medical Centre Göttingen; Göttingen Germany