1. Department of Infectious Diseases, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
2. Institute for Infectious Diseases, University of Bern, Bern, Switzerland
3. Neurologic Clinic and Policlinic, Departments of Medicine, Biomedicine, and Clinical Research, University Hospital Basel, University of Basel, Basel, Switzerland
4. Department of Intensive Care Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
5. Institute for Infectious Diseases, University of Bern, Friedbuehlstrasse 51, CH-3001 Bern, Switzerland