1. Infection Control Program and World Health Organization Collaborating Centre on Patient Safety, University of Geneva Hospitals and Faculty of Medicine, Geneva, Switzerland
2. Unité Mixte de Recherche (UMR) 1137, Infection, Antimicrobials, Modelling, Evolution (IAME), INSERM, Université de Paris, Paris, France
3. Division of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, Zurich, Switzerland