1. Department of Anaesthesiology and Critical Care Medicine; Berufsgenossenschaftliche Unfallklinik; Murnau am Staffelsee Germany
2. Department of Anaesthesiology, Intensive Care and Pain Therapy; Klinikum Traunstein; Traunstein Germany
3. Department of Anaesthesiology and Intensive Care Medicine; Medical University Innsbruck; Innsbruck Austria
4. Department of Medical Statistics, Informatics and Health Economy; Medical University Innsbruck; Innsbruck Austria
5. Department of Anaesthesiology and Intensive Care Medicine; Hospitallers Brothers Hospital; Paracelsus Medical University; Salzburg Austria