1 Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald, Germany.
2 Bundeswehr Institute of Microbiology, Munich, Germany.
3 Centre for Biological Threats and Special Pathogens, WHO Collaborating Centre for Emerging Infections and Biological Threats, Highly Pathogenic Viruses, German Consultant Laboratory for Poxviruses, Robert Koch Institute, Berlin, Germany.