1. Department of Interdisciplinary Medical Intensive Care, Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
2. Department of Cardiology and Angiology, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
3. Institute of Medical Biometry and Statistics, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
4. Department School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
5. Department of Emergency and Intensive care, Azienda Socio Sanitaria Territoriale Monza, Monza, Italy
6. Department of Internal Medicine V – Pneumology, Allergology and Critical Care Medicine, Saarland University Medical Center and University of Saarland, Homburg, Germany