1. Emergency Service, University Hospital Centre, Lausanne, Switzerland.
2. Department of Anesthesiology, Intensive Care Medicine and Emergency Medicine, Spitalzentrum Oberwallis, Visp, Switzerland.
3. Department of Intensive Care Medicine, Hôpital du Valais, Sion, Switzerland.
4. Department of Anesthesiology and Critical Care Medicine, Innsbruck Medical University, Innsbruck, Austria.