1. Robert Koch-Institute, Centre for Biological Threats and Special Pathogens 1, Berlin, Germany.
2. Institute of Public Health, National Reference Laboratory for Arboviruses, Ostrava, Czech Republic.
3. Baxter BioScience, Vienna, Austria.
4. Department of Medical Cell Biology, Uppsala University, Sweden.
5. Institut Virion\Serion GmbH, Würzburg, Germany.
6. Department of Infectious, Parasitic and Immunomediated Diseases, Instituto Superiore di Sanità, Rome, Italy.