1. Department of Anesthesiology and Critical Care Medicine; Innsbruck Medical University; Innsbruck Austria
2. Institute of Anesthesiology and Critical Care Medicine II; Klinikum Wels; Wels Austria
3. Department for Medical Statistics; Informatics and Health Economics; Innsbruck Medical University; Innsbruck Austria
4. Department of Anesthesiology and Critical Care Medicine; Krankenhaus St. Vinzenz in Zams; Zams Austria