1. Department of Intensive Care Medicine, Inselspital, Bern University Hospital and University of Bern, Freiburgstraße 10, 3010 Bern, Switzerland
2. Graduate School for Cellular and Biomedical Sciences, University of Bern, Switzerland
3. Department of Anesthesiology and Pain Therapy, Inselspital, Bern University Hospital and University of Bern, 3010 Bern, Switzerland