1. Microbiology Service; Hospital Clínico Universitario, Institute for Research INCLIVA; Valencia Spain
2. Department of Microbiology; School of Medicine; University of Valencia; Valencia Spain
3. Unit of Infectious Diseases; Instituto de Investigación Hospital 12 de Octubre (i+12); University Hospital 12 de Octubre; Universidad Complutense; Madrid Spain
4. Transplantation Center and Service of Infectious Diseases; University Hospital of Lausanne; CHUV; Lausanne Switzerland
5. Transplantation & Clinical Virology; Department Biomedicine; University of Basel; Basel Switzerland
6. Infectious Diseases & Hospital Epidemiology; University Hospital Basel; Basel Switzerland
7. National Centre for Transplantation; Department of Medicine and Surgery, Infectious and Tropical Diseases Unit; University of Insubria; Varese Italy