1. Centers for Disease Control and Prevention, Atlanta, GA, USA
2. Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Institute of Virology, Berlin, Germany
3. Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
4. Sahlgrenska University Hospital, Gothenburg, Sweden
5. University of Gothenburg, Gothenburg, Sweden
6. Jichi Medical University School of Medicine, Tochigi, Japan
7. Wageningen University and Research, Lelystad, The Netherlands
8. Department of Medical Microbiology and Immunology, Medical School, University of Pécs, Pécs, Hungary
9. University of Texas Medical Branch at Galveston, Galveston, Texas, USA
10. Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Riems, Germany
11. University of Oxford, England and University of Edinburgh, Scotland, UK