1. State Research Center of Virology and Biotechnology ‘Vector’, Koltsovo, Novosibirsk Region 630559, Russia
2. D. I. Ivanovskii Institute of Virology, Russian Academy of Medical Sciences, Moscow 123098, Russia
3. Freie Universität Berlin, Fachbereich Humanmedizin, Institut für Infektionsmedizin, 12203 Berlin, Germany
4. University of Nevada at Reno, Reno, NV 89557, USA