1. Institute of Virology, Philipps-University, Marburg, Germany
2. Institute of Pharmaceutical Chemistry, Philipps-University, Marburg, Germany
3. Department of Biomedical Sciences, Carlson College of Veterinary Medicine, Oregon State University, Corvallis, OR, USA
4. Fraunhofer Institute for Molecular Biology and Applied Ecology, Gießen, Germany
5. German Center for Infection Research (DZIF), Marburg-Gießen-Langen Site, Emerging Infections Unit, Philipps-University, Marburg, Germany