1. Division of Infectious Diseases and Hospital Epidemiology University Hospital Zurich ZurichSwitzerland
2. Institute of Medical Virology University of Zurich Zurich Switzerland
3. Division of Infectious Diseases University Hospital of Geneva Geneva Switzerland
4. Transplantation & Clinical Virology, Department Biomedicine University of Basel Basel Switzerland
5. Clinical Virology, Laboratory Medicine / Infectious Diseases & Hospital Epidemiology University Hospital Basel Basel Switzerland
6. Faculty of Biology and Medicine University of Lausanne Lausanne Switzerland
7. Infectious Diseases Department Cantonal Hospital of Sankt Gallen St. Gallen Switzerland
8. Department of Infectious Diseases, Inselspital Bern University HospitalUniversity of Bern Bern Switzerland
9. Department of Internal Medicine Clinica Luganese Moncucco Lugano Switzerland