1. Institute of Intensive Care Medicine, University Hospital Zurich, Zurich, Switzerland;
2. Department of Respiratory Medicine,
3. Biomedical Research in End-Stage and Obstructive Lung Disease Hannover,
4. German Center for Lung Research, Hannover, Germany; and
5. Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
6. Department of Gastroenterology, Hepatology, Infectious Diseases and Endocrinology,
7. Department of Nephrology, Hannover Medical School, Hannover, Germany;