1 Institute for Microbiology and Hygiene, Medical Center-University of Freiburg, Freiburg, Germany.
2 Renal Division, Department of Internal Medicine, Medical Center-University of Freiburg, Freiburg, Germany.
3 Bundeswehr Institute of Microbiology, Munich, Germany.
4 Institute for Virology, Medical Center-University of Freiburg, Freiburg, Germany.
5 Division of Infectious Diseases, Department of Medicine II, Medical Center-University of Freiburg, Freiburg, Germany.
6 Division of Infectious Diseases, Department of Medicine II, Medical Center-University of Freiburg, Freiburg, Germany dirk.wagner@uniklinik-freiburg.de.