1. Department of Anesthesia and Intensive Care; University Hospital Marburg; Marburg Germany
2. Department of Anesthesia and Intensive Care Medicine; Diakonie-Klinikum Schwaebisch Hall; Schwaebisch Hall Germany
3. Department of Pathology; University Hospital Marburg; Marburg Germany
4. Anesthesia Division; Department of Surgery; Valencia School of Medicine; Valencia Spain
5. Department of Anesthesiology & Critical Care; Klinikum Neumarkt; Neumarkt i.d.OPf. Germany