1. Department of Anesthesiology and Intensive Care, Philipps-University Marburg, Marburg, Germany
2. Clinic for Intensive Care, Emergency Medicine and Pain Therapy, Hospital Ludwigsburg, Ludwigsburg, Germany
3. ratiopharm GmbH, Ulm, Germany
4. Teva GmbH, Ulm, Germany
5. ACOMED statistik, Leipzig, Germany
6. Research Center Neurosensory Science, Carl von Ossietzky University Oldenburg, Oldenburg, Germany
7. Department of Anesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, Würzburg, Germany
8. Department of Anesthesiology, Intensive Care and Pain Therapy, Saarland University Faculty of Medicine, Homburg, Germany
9. Department of Anesthesiology and Intensive Care, Varisano Hospital Frankfurt-Höchst, Frankfurt, Germany