1 Division of Infectious Diseases and Tropical Medicine, Department of Medicine I, Medical University of Vienna, Vienna, Austria.
2 Division of Clinical and Experimental Immunology, Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria.
3 Section of Medical Statistics, Center for Medical Statistics, Informatics and Intelligent Systems, Medical University of Vienna, Vienna, Austria.
4 Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria.
5 Center for Virology, Medical University of Vienna, Vienna, Austria.
6 Division of Hematology, Department of Internal Medicine, Medical University of Graz, Graz, Austria.
7 Bone Marrow Transplantation Unit, Department of Medicine I, Medical University of Vienna, Vienna, Austria.
8 Department of Tropical Medicine, Bernhard Nocht Institute for Tropical Medicine & I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
9 Institute of Infectious Diseases and Infection Control, Jena University Hospital, Jena, Germany.