1 Infectious Diseases Service and Transplantation Centre, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland. Electronic address: Oriol.Manuel@chuv.ch.
2 Department of Infectious Diseases and Tropical Medicine, Necker-Enfants Malades Hospital, Assistance Publique - Hôpitaux de Paris, Paris, France.
3 Division of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, Zurich, Switzerland.
4 Transplant Infectious Diseases Unit, University Hospitals Geneva and Faculty of Medicine, Geneva, Switzerland.