1. Department of Anaesthesiology, University of Regensburg, Regensburg,
2. Medical Centre of the City of Nürnberg
3. Department of Anaesthesiology, Emergency and Intensive Care Medicine University of Göttingen, Göttingen
4. Emergency Medical Care Department of the City of Braunschweig
5. Emergency Medical Care Department of the City of Kaiserslautern
6. Department of Anaesthesiology, University of Regensburg, Regensburg