1. Department of Anaesthesiology and Intensive Care Medicine, University Clinic Innsbruck, Medical University Innsbruck, Innsbruck, Austria.
2. Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy.
3. Department of Anaesthesiology and Critical Care Medicine, General Hospital Brixen, Brixen, Italy.
4. Department of Orthopaedics and Traumatology, University Hospital Hall in Tirol, Hall in Tirol, Austria.