1. Department of Internal Medicine, Division of Infectious Diseases, Cantonal Hospital St. Gallen, St. Gallen, Switzerland
2. Department of Neurosurgery, Cantonal Hospital St. Gallen, St. Gallen, Switzerland
3. Center of Laboratory Medicine, Department of Bacteriology, Mycology and Parasitology, St. Gallen, Switzerland
4. Clinical Microbiology, University Hospital, Basel, Switzerland
5. Service of Infectious Diseases, Geneva University Hospitals & Faculty of Medicine, University of Geneva, Geneva, Switzerland