1. Department of Anaesthesia and Intensive Care; Cnopf Children's Hospital/Hospital Hallerwiese; Nürnberg Germany
2. Department of Anaesthesia; Paediatric Intensive Care and Emergency Medicine; Auf der Bult Children's Hospital; Hannover Germany
3. Department of Anaesthesiology and Intensive Care Medicine; University Hospital Leipzig; Leipzig Germany
4. Department of Anaesthesia; Luzerner Kantonsspital; Lucerne Switzerland
5. Department of Anaesthesiology; Sophia Children's Hospital; Erasmus MC; Rotterdam The Netherlands
6. Department of Anaesthesiology; University Hospital Ulm; Ulm Germany
7. Clinic for Anaesthesiology and Intensive Care Medicine; Hannover Medical School; Hannover Germany