1. Department of Microbiology and Infection Control, University Hospital of North Norway
2. Department of Microbiology and Virology, Institute for Medical Microbiology, University of Tromsø, Tromsø, Norway
3. Transplantation Virology, Institute for Medical Microbiology, Department of Biomedicine, University of Basel
4. Infectious Diseases & Hospital Epidemiology, University Hospital Basel, Basel, Switzerland