1. Department of Virology, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
2. Chumakov Federal Scientific Center for the Research and Development of Immune-and-Biological Products, Village of Institute of Poliomyelitis, Settlement “Moskovskiy”, 108819 Moscow, Russia
3. Institute of Virology, Philipps University, Hans-Meerwein-Str. 2, 35043 Marburg, Germany
4. The Gamaleya Research Center for Epidemiology and Microbiology of the Russian Ministry of Health, 123098 Moscow, Russia