1. Division of Infectious Diseases, University Hospital of Geneva, Geneva, Switzerland
2. Bone Marrow Transplant Unit, Division of Hematology, University Hospital of Geneva, and Faculty of Medicine, University of Geneva, Geneva, Switzerland
3. Laboratory of Bacteriology, Diagnostic Department, University Hospital of Geneva, Geneva, Switzerland
4. Clinical Research Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
5. Division of Clinical Epidemiology, Department of Health and Community Medicine, University Hospital of Geneva, Geneva, Switzerland
6. Division of Infectious Diseases, University Hospital of Lausanne, Lausanne, Switzerland