1. Institute of Pharmaceutical Chemistry, Philipps University, Marbacher Weg 6, 35032 Marburg, Germany
2. Institute of Virology, Philipps University, Hans-Meerwein-Strasse 2, 35043 Marburg, Germany
3. Department of Infectious Diseases, Molecular Virology, Heidelberg University and German Center for Infection Research, Heidelberg Partner Site, Im Neuenheimer Feld 344, 69120 Heidelberg, Germany
4. Department of Biosciences, University of Salzburg, Billrothstrasse 11, 5020 Salzburg, Austria